<SEC-DOCUMENT>0001209191-20-049902.txt : 20200909
<SEC-HEADER>0001209191-20-049902.hdr.sgml : 20200909
<ACCEPTANCE-DATETIME>20200909213149
ACCESSION NUMBER:		0001209191-20-049902
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200904
FILED AS OF DATE:		20200909
DATE AS OF CHANGE:		20200909

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			AEBISCHER PATRICK
		CENTRAL INDEX KEY:			0001683047

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-29174
		FILM NUMBER:		201167605

	MAIL ADDRESS:	
		STREET 1:		C/O LOGITECH INTERNATIONAL S.A.
		STREET 2:		LES CHATAGNIS
		CITY:			APPLES
		STATE:			V8
		ZIP:			1143

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LOGITECH INTERNATIONAL S.A.
		CENTRAL INDEX KEY:			0001032975
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER PERIPHERAL EQUIPMENT, NEC [3577]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		7700 GATEWAY BOULEVARD
		STREET 2:		C/O LOGITECH INC
		CITY:			NEWARK
		STATE:			CA
		ZIP:			94560
		BUSINESS PHONE:		5107958500

	MAIL ADDRESS:	
		STREET 1:		7700 GATEWAY BOULEVARD
		CITY:			NEWARK
		STATE:			CA
		ZIP:			94560

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LOGITECH INTERNATIONAL SA
		DATE OF NAME CHANGE:	19970214
</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>2020-09-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001032975</issuerCik>
        <issuerName>LOGITECH INTERNATIONAL S.A.</issuerName>
        <issuerTradingSymbol>LOGI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001683047</rptOwnerCik>
            <rptOwnerName>AEBISCHER PATRICK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LOGITECH INTERNATIONAL S.A.</rptOwnerStreet1>
            <rptOwnerStreet2>LES CHATAGNIS</rptOwnerStreet2>
            <rptOwnerCity>APPLES</rptOwnerCity>
            <rptOwnerState>V8</rptOwnerState>
            <rptOwnerZipCode>1143</rptOwnerZipCode>
            <rptOwnerStateDescription>SWITZERLAND</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Registered Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2020-09-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>266</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>68.80</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>17373</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Registered Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2020-09-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3144</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20517</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">In an exempt disposition to the issuer under rule 16b-3(e), the recipient remitted shares to the issuer in connection with the satisfaction of tax withholding obligations arising out of the vesting of shares with respect to previously reported restricted stock units.</footnote>
        <footnote id="F2">The reported amount represents the purchase price on the SIX Swiss Exchange of CHF 62.74, as converted into U.S. dollars at the exchange rate of 1 CHF to U.S. $1.09656, as in effect on September 4, 2020.</footnote>
        <footnote id="F3">Each restricted stock unit (RSU) represents the right to receive, following vesting, one Logitech share. The RSU's vest in full on the first anniversary of the grant date or, if earlier and only if the director is not re-elected as a director at such annual general meeting, the date of the next annual general meeting following the grant date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jon Shanberge as attorney in fact for Patrick Aebischer</signatureName>
        <signatureDate>2020-09-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
