Kildare North TD, Catherine Murphy, is party co-leader.
The Foreign Affairs Minister's facing mounting calls from the opposition to resign ahead of a no confidence motion in the Dail tomorrow.
The motion centres around Simon Coveney's handling of the appointment of Katherine Zappone to a UN Special Envoy role.
He has faced criticism for offering the newly created job to a former minister without it being publicly advertised.
Government ministers have described the vote as a "publicity stunt" but Labour has indicated it'll be supporting the Sinn Fein motion.
Social Democrats co-leader, Kildare North TD Catherine Murphy, says they'll also be backing it:
Deputy Murphy says the minister's attempts to put the issue to bed at recent committee meetings failed
:

Kfm Obituary Notices
Kilcullen School Awarded Special Class For New School Year
Council Issue Positive Updates For Broadford Infrastructure Plans
Kilcock Growing "Rapidly" As Wait For Local Area Plan Will Continue Until Q4
Over €200,000 Of Newbridge Hall Funds To Be Transferred To Irish Language Group
KCC Announce Fund Of €50,000 For Local Groups In Kildare
Man Due In Court After Assault Of Three Gardaí In Newbridge Yesterday
Councillor Unhappy With Lack Of Progress For Straffan Playground