| British Rail Class D3/3 | |
| Powertype: | Diesel-electric |
| Fleetnumbers: | 13117–13126; later D3117–D3126 |
| Builder: | British Railways’ Derby Works |
| Builddate: | 1955 |
| Totalproduction: | 10 |
| Primemover: | Crossley ESNT 6 |
| Tractionmotors: | Crompton Parkinson, 2 off |
| Whytetype: | 0-6-0 DE |
| Uicclass: | C |
| Wheeldiameter: | 4feet |
| Trainbrakes: | Vacuum |
| Locoweight: | 47.5LT |
| Maxspeed: | 200NaN0 |
| Poweroutput: | Engine: 350bhp |
| Tractiveeffort: | 35000lbf |
| Trainheating: | None |
| Multipleworking: | Not fitted |
| Axleloadclass: | Route availability 5 |
| Operatorclass: | D3/3; later 3/1B; no TOPS class |
| Retiredate: | 1966–1967 |
British Rail Class D3/3 was a 0-6-0 shunting locomotive built by British Rail at their Derby Works in England. It was similar to the British Rail Class 08, except they were built with different engines and traction motors. They were all withdrawn and scrapped after only twelve years of service.