<SEC-DOCUMENT>0001209191-17-021777.txt : 20170320
<SEC-HEADER>0001209191-17-021777.hdr.sgml : 20170320
<ACCEPTANCE-DATETIME>20170320172304
ACCESSION NUMBER:		0001209191-17-021777
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170316
FILED AS OF DATE:		20170320
DATE AS OF CHANGE:		20170320

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Clearside Biomedical, Inc.
		CENTRAL INDEX KEY:			0001539029
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				452437375
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1220 OLD ALPHARETTA RD
		STREET 2:		SUITE 300
		CITY:			ALPHARETTA
		STATE:			GA
		ZIP:			30005
		BUSINESS PHONE:		678-270-4005

	MAIL ADDRESS:	
		STREET 1:		1220 OLD ALPHARETTA RD
		STREET 2:		SUITE 300
		CITY:			ALPHARETTA
		STATE:			GA
		ZIP:			30005

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cagle Gerald D.
		CENTRAL INDEX KEY:			0001589991

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37783
		FILM NUMBER:		17702314

	MAIL ADDRESS:	
		STREET 1:		135 U.S. HIGHWAY 206
		STREET 2:		SUITE 15
		CITY:			BEDMINSTER
		STATE:			NJ
		ZIP:			07921
</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>2017-03-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001539029</issuerCik>
        <issuerName>Clearside Biomedical, Inc.</issuerName>
        <issuerTradingSymbol>CLSD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001589991</rptOwnerCik>
            <rptOwnerName>Cagle Gerald D.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CLEARSIDE BIOMEDICAL, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>900 NORTH POINT PARKWAY, SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>ALPHARETTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30005</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-03-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.84</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10941</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Brian F. Leaf, Attorney-in-Fact</signatureName>
        <signatureDate>2017-03-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
