<SEC-DOCUMENT>0000018349-23-000102.txt : 20230428
<SEC-HEADER>0000018349-23-000102.hdr.sgml : 20230428
<ACCEPTANCE-DATETIME>20230428162023
ACCESSION NUMBER:		0000018349-23-000102
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230426
FILED AS OF DATE:		20230428
DATE AS OF CHANGE:		20230428

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Apter Stacy
		CENTRAL INDEX KEY:			0001972432

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10312
		FILM NUMBER:		23866629

	MAIL ADDRESS:	
		STREET 1:		1111 BAY AVENUE
		CITY:			COLUMBUS
		STATE:			GA
		ZIP:			31901

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNOVUS FINANCIAL CORP
		CENTRAL INDEX KEY:			0000018349
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				581134883
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1111 BAY AVENUE
		STREET 2:		STE 500
		CITY:			COLUMBUS
		STATE:			GA
		ZIP:			31901
		BUSINESS PHONE:		7066492311

	MAIL ADDRESS:	
		STREET 1:		1111 BAY AVENUE
		STREET 2:		STE 500
		CITY:			COLUMBUS
		STATE:			GA
		ZIP:			31901

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CB&T BANCSHARES INC
		DATE OF NAME CHANGE:	19890912
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_168271319647468.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0407</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-04-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000018349</issuerCik>
        <issuerName>SYNOVUS FINANCIAL CORP</issuerName>
        <issuerTradingSymbol>SNV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001972432</rptOwnerCik>
            <rptOwnerName>Apter Stacy</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1111 BAY AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>COLUMBUS</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>31901</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-04-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3550</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>29.58</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3550</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person has elected to defer these shares pursuant to Synovus' director deferred compensation plan. The shares will be be paid out (i) in accordance with the Reporting Person's deferral election; or, if earlier, (ii) upon termination of the Reporting Person's service as a Director.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Mary Maurice Young</signatureName>
        <signatureDate>2023-04-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
