Thai League 3
| Organising body | Thai League |
|---|---|
| Founded | 2017 |
| Country | Thailand |
| Confederation | AFC |
| Number of clubs | 72 |
| Level on pyramid | 3 |
| Promotion to | Thai League 2 |
| Relegation to | Thailand Semi-pro League |
| Domestic cup(s) | Thai FA Cup |
| League cup(s) | Thai League Cup Thai League 3 Cup |
| Current champions | Bangkok (1st title) (2023–24) |
| Broadcaster(s) | NBT 2HD (Thailand, IPTV) From The National Championship stage |
| Website | thaileague.co.th |
| Current: 2024–25 Thai League 3 | |
Thai League 3 or Thailand Regional Championship, commonly known as the T3, is the third level of Thai football. It was started in 2017 First season. In 2017, the League is divided in 2 regions and participated by 32 clubs 1st-4th clubs from 8 regions which are former members Regional League Division 2 and debutants in the season.