| Sunamganj-3 | |
| Parl Name: | Jatiya Sangsad |
| District: | Sunamganj District |
| Region Label: | Division |
| Region: | Sylhet Division |
| Electorate: | 292,471 (2018) |
| Year: | 1984 |
| Members: | - |
| Party: | - |
Sunamganj-3 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh since 2008 by M. A. Mannan of the Awami League.
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.