| Chittagong-3 | |
| Parl Name: | Jatiya Sangsad |
| District: | Chittagong District |
| Region Label: | Division |
| Region: | Chittagong Division |
| Electorate: | 202,635 (2018) |
| Year: | 1973 |
| Members Label: | Member of Parliament |
| Members: | Vacant |
| Party Label: | Parliamentary Party |
| Party: | Vacant |
| Local Council Label: | Council area |
| Local Council: | Sandwip Upazila |
| Blank1 Name: | Prev. Constituency |
| Blank1 Info: | Chittagong-2 (Constituency 279) |
| Blank2 Name: | Next Constituency |
| Blank2 Info: | Chittagong-4 (Constituency 281) |
Chittagong-3 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh. Since 6 August 2024 the constituency is Vacant.
The constituency encompasses Sandwip Upazila.
The constituency was created for the first general elections in newly independent Bangladesh, held in 1973.
Ahead of the 2014 general election, the Election Commission renumbered the seat for Sandwip Upazila from Chittagong-16 to Chittagong-3, bumping up by one the suffix of the former constituency of that name and the higher numbered constituencies in the district. Previously Chittagong-3 encompassed Sitakunda Upazila and Chittagong City Corporation wards 9 and 10.
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