2020–21 Thai League 3 Northeastern Region
| Season | 2020–21 |
|---|---|
| Dates | 3 October 2020 – 3 January 2021 |
| Champions | Udon United |
| T3 National Championship | Udon United Muang Loei United |
| Matches played | 85 |
| Goals scored | 283 (3.33 per match) |
| Top goalscorer | Jardel Capistrano (22 goals; Udon United) |
| Biggest home win | 8 goals difference Udon United 8–0 Surin City (3 October 2020) |
| Biggest away win | 7 goals difference Mahasarakham 2–9 Udon United (27 December 2020) |
| Highest scoring | 11 goals Mahasarakham 2–9 Udon United (27 December 2020) |
| Longest winning run | 9 matches Udon United |
| Longest unbeaten run | 16 matches Udon United |
| Longest winless run | 12 matches Chaiyaphum United |
| Longest losing run | 6 matches Khon Kaen Mordindang |
2021–22 → | |
The 2020–21 Thai League 3 Northeastern region is a region in the regional stage of the 2020–21 Thai League 3. Due to the COVID-19 pandemic, the season must be postponed to start in late 2020 and end in early 2021. In addition, the Thai League 4 had combined with the Thai League 3 and compete as Thai League 3 since this season and there is no relegation in this season. A total of 11 teams located in Northeastern of Thailand will compete in the league of the Northeastern region.
In late December 2020, COVID-19 had spread again in Thailand, the FA Thailand must abruptly end the regional stage of the Thai League 3.