<SEC-DOCUMENT>0001209191-22-036933.txt : 20220615
<SEC-HEADER>0001209191-22-036933.hdr.sgml : 20220615
<ACCEPTANCE-DATETIME>20220615160017
ACCESSION NUMBER:		0001209191-22-036933
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220614
FILED AS OF DATE:		20220615
DATE AS OF CHANGE:		20220615

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Khuong Chau Quang
		CENTRAL INDEX KEY:			0001609405

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39655
		FILM NUMBER:		221017743

	MAIL ADDRESS:	
		STREET 1:		C/O ORBIMED ADVISORS
		STREET 2:		601 LEXINGTON AVENUE, 54TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Galecto, Inc.
		CENTRAL INDEX KEY:			0001800315
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				371957007
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		75 STATE STREET
		STREET 2:		SUITE 100
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		45-70-70-52-10

	MAIL ADDRESS:	
		STREET 1:		75 STATE STREET
		STREET 2:		SUITE 100
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Galecto Inc.
		DATE OF NAME CHANGE:	20200116
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-06-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001800315</issuerCik>
        <issuerName>Galecto, Inc.</issuerName>
        <issuerTradingSymbol>GLTO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001609405</rptOwnerCik>
            <rptOwnerName>Khuong Chau Quang</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GALECTO, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>OLE MAALOES VEJ 3</rptOwnerStreet2>
            <rptOwnerCity>COPENHAGEN N G7</rptOwnerCity>
            <rptOwnerState>G7</rptOwnerState>
            <rptOwnerZipCode>DK-2200</rptOwnerZipCode>
            <rptOwnerStateDescription>DENMARK</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>/s/ Jonathan Freve, attorney-in-fact</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.98</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2022-06-14</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>18000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2032-06-13</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>18000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>18000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to the Issuer's Non-Employee Director Compensation Policy, this option was automatically granted on June 14, 2022, the date of the Issuer's 2022 Annual Meeting of Stockholder, with shares subject to the option vesting in equal monthly installments until the first anniversary of the grant date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jonathan Freve, attorney-in-fact</signatureName>
        <signatureDate>2022-06-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
