Somerset 3 South
| Current season or competition: 2020–21 Somerset 3 South | |
| Sport | Rugby union |
|---|---|
| Instituted | 1987 (as Somerset 3) |
| Number of teams | 5 |
| Country | England |
| Holders | Cheddar Valley II (1st title) (2019–20) (promoted to Somerset 2 South) |
| Most titles | Avonvale, Hornets III, St. Brendan's Old Boys, Taunton III (2 titles) |
| Website | englandrugby.com |
Somerset 3 South (known as Tribute Somerset 3 South for sponsorship reasons) is an English rugby union league which sits at the eleven level of league rugby union in England alongside its counterpart Somerset 3 North. When the division was founded in 1987 it was a single league known as Somerset 3, but since 2006 it has been split into two regional divisions.
Somerset 3 South currently involves teams from the southern part of Somerset - although this means anywhere in the county outside Bristol. 1st, 2nd, 3rd and even 4th XV sides can participate in the division as long as they are not from the same club. The league champions, and occasionally runners up, are promoted to Somerset 2 South and there is no relegation as this is the lowest level of league rugby in Somerset.