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
Online School Admissions System Expanded To Maynooth To Make Process Less Stressful For Parents And Students
Plans For Nine Homes In Kildare Town Refused Over Heritage Concerns
Two Kildare Pubs Shortlisted For National Irish Pub Awards
Kildare TD Calls For More Rail Capacity Amid Overcrowding Concerns
Sallins Singer Arlene Bailey Opens Up On Mental Health During Aware Mental Health Week
Curragh Singer To Take To Stage For 75th Wexford Festival Opera