| Box Width: | 30em |
| 3rd Parliament of Ceylon | |
| Body: | Parliament of Ceylon |
| Election: | 5–10 April 1956 |
| Term Start: | 19 April 1956 |
| Term End: | 5 December 1959 |
| Before: | 4th |
| After: | 6th |
| Chamber1: | Senior parliamentarians |
| Chamber1 Leader1 Type: | Speaker |
| Chamber1 Leader1: | Hameed Hussain Sheikh Ismail |
| Chamber1 Leader2 Type: | Deputy Speaker and Chairman of Committees |
| Chamber1 Leader2: | Piyasena Tennakoon, SLFP (1956–58) R. S. Pelpola, SLFP (1958–59) |
| Chamber1 Leader3 Type: | Deputy Chairman of Committees |
| Chamber1 Leader3: | R. S. Pelpola, SLFP (1956–58) L. S. Jinasena, UNP (1958–59) |
| Chamber1 Leader4 Type: | Prime Minister |
| Chamber1 Leader4: | S. W. R. D. Bandaranaike, SLFP (1956–59) Wijeyananda Dahanayake, MEP (1959) |
| Chamber1 Leader5 Type: | Leader of the Opposition |
| Chamber1 Leader5: | N. M. Perera, LSSP |
| Chamber1 Leader6 Type: | Leader of the House |
| Chamber1 Leader6: | C. P. de Silva, SLFP |
| Chamber2 Leader1 Type: | Chief Government Whip |
| Chamber2 Leader1: | W. J. C. Moonesinghe, SLFP |
| Session1 Type: | 1st |
| Session1 Start: | 19 April 1956 |
| Session1 End: | 3 May 1957 |
| Session2 Type: | 2nd |
| Session2 Start: | 13 June 1957 |
| Session2 End: | 15 May 1958 |
| Session3 Type: | 3rd |
| Session3 Start: | 4 June 1958 |
| Session3 End: | 23 May 1959 |
| Session4 Type: | 4th |
| Session4 Start: | 30 June 1959 |
| Session4 End: | 5 December 1959 |
The 3rd Parliament of Ceylon was a meeting of the Parliament of Ceylon, with the membership determined by the results of the 1956 parliamentary election between 5 and 10 April 1956. The parliament met for the first time on 19 April 1956 and was dissolved on 5 December 1959.