<SEC-DOCUMENT>0000899243-20-025653.txt : 20200917
<SEC-HEADER>0000899243-20-025653.hdr.sgml : 20200917
<ACCEPTANCE-DATETIME>20200917215551
ACCESSION NUMBER:		0000899243-20-025653
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200915
FILED AS OF DATE:		20200917
DATE AS OF CHANGE:		20200917

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Jakobovits Aya
		CENTRAL INDEX KEY:			0001823901

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38359
		FILM NUMBER:		201182682

	MAIL ADDRESS:	
		STREET 1:		3135 HUTTON DRIVE
		CITY:			BEVERLY HILLS
		STATE:			CA
		ZIP:			90210

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Adicet Bio, Inc.
		CENTRAL INDEX KEY:			0001720580
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				813305277
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		500 BOYLSTON STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		617-482-2333

	MAIL ADDRESS:	
		STREET 1:		500 BOYLSTON STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	resTORbio, Inc.
		DATE OF NAME CHANGE:	20171024
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-09-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001720580</issuerCik>
        <issuerName>Adicet Bio, Inc.</issuerName>
        <issuerTradingSymbol>ACET</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001823901</rptOwnerCik>
            <rptOwnerName>Jakobovits Aya</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ADICET BIO, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>500 BOYLSTON STREET, 13TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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                <value>Common Stock</value>
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                <value>2020-09-15</value>
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                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
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            <transactionAmounts>
                <transactionShares>
                    <value>627812</value>
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                    <value>627812</value>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By grantor retained annuity trusts.</value>
                    <footnoteId id="F4"/>
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            <securityTitle>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
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            <transactionTimeliness>
                <value></value>
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                <transactionShares>
                    <value>77500</value>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
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                    <value>By grantor retained irrevocable trust.</value>
                    <footnoteId id="F6"/>
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        <nonDerivativeTransaction>
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                <transactionFormType>4</transactionFormType>
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            <transactionTimeliness>
                <value></value>
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                <transactionShares>
                    <value>77500</value>
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                <directOrIndirectOwnership>
                    <value>I</value>
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                    <value>By grantor retained irrevocable trust.</value>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-Qualified Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>16.11</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2020-09-17</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>30000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <value>2030-09-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>30000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>30000</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Received in exchange for 5,063,006 shares of common stock of Adicet Bio, Inc., a Delaware corporation (&quot;Old Adicet&quot;), in connection with the merger (the &quot;Merger&quot;) of Old Adicet with and into Project Oasis Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of resTORbio, Inc., a Delaware corporation (&quot;resTORbio&quot;).  On the effective date of the Merger, resTORbio changed its name to &quot;Adicet Bio, Inc.&quot;  The closing price of resTORbio's common stock on the effective date of the Merger was $[ ] per share.</footnote>
        <footnote id="F2">Received in exchange for 1,095,154 shares of common stock of Adicet Bio, Inc., a Delaware corporation (&quot;Old Adicet&quot;), in connection with the merger (the &quot;Merger&quot;) of Old Adicet with and into Project Oasis Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of resTORbio, Inc., a Delaware corporation (&quot;resTORbio&quot;).  On the effective date of the Merger, resTORbio changed its name to &quot;Adicet Bio, Inc.&quot;  The closing price of resTORbio's common stock on the effective date of the Merger was $[ ] per share.</footnote>
        <footnote id="F3">Received in exchange for  625,000 shares of common stock of Adicet Bio, Inc., a Delaware corporation (&quot;Old Adicet&quot;), in connection with the merger (the &quot;Merger&quot;) of Old Adicet with and into Project Oasis Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of resTORbio, Inc., a Delaware corporation (&quot;resTORbio&quot;).  On the effective date of the Merger, resTORbio changed its name to &quot;Adicet Bio, Inc.&quot;  The closing price of resTORbio's common stock on the effective date of the Merger was $[ ] per share.</footnote>
        <footnote id="F4">Shares held in a grantor retained annuity trust (&quot;GRAT&quot;) of which Dr. Jakobovits's spouse is the trustee and Dr. Jakobovits the sole annuitant and current beneficiary.</footnote>
        <footnote id="F5">Shares held in a GRAT of which Dr. Jakobovits's spouse is the trustee and Dr. Jakobovits the sole annuitant and current beneficiary.</footnote>
        <footnote id="F6">Shares held in a trust of which Dr. Jakobovits's spouse is the trustee and Dr. Jakobovits's child is the beneficiary.</footnote>
        <footnote id="F7">Shares held in a trust of which Dr. Jakobovits's spouse is the trustee and Dr. Jakobovits's child is the beneficiary.</footnote>
        <footnote id="F8">The shares of common stock subject to the option shall vest in equal installments on each of the thirty-six (36) monthly anniversaries of the [vesting commencement date], provided that the reporting person remains in continuous service as of the applicable vesting date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Nick Harvey, Attorney-in-Fact for Aya Jakobovits</signatureName>
        <signatureDate>2020-09-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
