| Devon League 3 | |
| Current Season: | 2002–03 Devon League 3 |
| Sport: | Rugby union |
| Teams: | 6 |
| Champion: | Salcombe (1st title) |
| Season: | 2002–03) (promoted to Devon 2 |
| Most Champs: | Prince Rock Woodland Fort |
| Count: | 2 |
Devon League 3 was an English level eleven rugby union league for clubs based in Devon. The champions were promoted to Devon League 2 and, as this was the lowest division in club rugby within Devon, there was no relegation. The league was introduced ahead of the 1996–97 season and ran for seven seasons until it was cancelled at the end of the 2002–03 season, with all teams promoted into Devon League 2.
When this division was introduced in 1996 it contained the following teams:
Jesters were also relegated from Devon 2 and should have joined Devon 3. However, they dropped out of the leagues and would become amalgamated with Old Plymothian & Mannamedian.
Devon 3 was a tier 11 league. Promotion was to Devon 2 and there was no relegation.
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| Season | No of teams | Champions | Runners-up | Relegated team(s) | Ref | ||||||||||
| 1996–97 | 8 | Wessex | No relegation | [1] | |||||||||||
| 1997–98 | 7 | Devonport HSOB | No relegation | ||||||||||||
| 1998–99 | 6 | Plymouth YMCA | No relegation | [2] | |||||||||||
| 1999–00 | 8 | Prince Rock Woodland Fort | No relegation | [3] | |||||||||||
| 2000–01 | 6 | Dartmouth | No relegation | [4] | |||||||||||
| 2001–02 | 6 | Prince Rock Woodland Fort | No relegation | [5] | |||||||||||
| 2002–03 | 6 | Salcombe | No relegation | [6] | |||||||||||
| Green backgrounds are promotion places. | |||||||||||||||