| Cox's Bazar-3 | |
| Parl Name: | Jatiya Sangsad |
| District: | Cox's Bazar District |
| Region Label: | Division |
| Region: | Chittagong Division |
| Electorate: | 414,930 (2018) |
| Year: | 1984 |
Cox's Bazar-3 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh. Since 6 August 2024 the constituency is Vacant.
The constituency encompasses Cox's Bazar Sadar, Ramu and Eidgaon upazilas.
The constituency was created in 1984 from the Chittagong-17 constituency when the former Chittagong District was split into two districts: Chittagong and Cox's Bazar. The boundaries remained the same.
Shaimum Sarwar Kamal was elected unopposed in the 2014 general election after opposition parties withdrew their candidacies in a boycott of the election.
The BNP candidate died days before the 1 October 2001 general election. Voting in the constituency was postponed until 1 November. Mohammad Sahiduzzaman, the deceased's younger brother, ran in his place.