<SEC-DOCUMENT>0001209191-21-047020.txt : 20210716
<SEC-HEADER>0001209191-21-047020.hdr.sgml : 20210716
<ACCEPTANCE-DATETIME>20210716193830
ACCESSION NUMBER:		0001209191-21-047020
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210715
FILED AS OF DATE:		20210716
DATE AS OF CHANGE:		20210716

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Harnett Samantha
		CENTRAL INDEX KEY:			0001475223

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-29174
		FILM NUMBER:		211096574

	MAIL ADDRESS:	
		STREET 1:		1836 CLEMENS ROAD
		CITY:			OAKLAND
		STATE:			CA
		ZIP:			94602

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>2021-07-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001475223</rptOwnerCik>
            <rptOwnerName>Harnett Samantha</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LOGITECH INC.</rptOwnerStreet1>
            <rptOwnerStreet2>7700 GATEWAY BLVD.</rptOwnerStreet2>
            <rptOwnerCity>NEWARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94560</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>General Counsel</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Registered Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2021-07-15</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>1481</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>119.52</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20029</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>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jon Shanberge as attorney in fact for Samantha Harnett</signatureName>
        <signatureDate>2021-07-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
