Sunamganj-3 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh. Since 6 August 2024, the constituency remains vacant.
The constituency encompasses Shantiganj and Jagannathpur upazilas.
The constituency was created in 1984 from a Sylhet constituency when the former Sylhet District was split into four districts: Sunamganj, Sylhet, Moulvibazar, and Habiganj.
Abdus Samad Azad died in April 2005. Islami Oikya Jote leader Shahinur Pasha Chowdhury was elected in a July 2005 by-election. He defeated Awami League candidate M. A. Mannan, Jatiya Party (Ershad) candidate Syed Ali Ahmed, independent candidate M. Nazrul Islam, and five other lower-polling contenders.