2020–21 Thai League 3 Eastern Region
| Season | 2020–21 |
|---|---|
| Dates | 3 October 2020 – 3 January 2021 |
| Champions | Pluakdaeng United |
| T3 National Championship | Pluakdaeng United Chachoengsao Hi-Tek |
| Matches played | 98 |
| Goals scored | 277 (2.83 per match) |
| Top goalscorer | Burnel Okana-Stazi (17 goals; Bankhai United) |
| Biggest home win | 6 goals difference Chachoengsao Hi-Tek 6–0 Pattaya Discovery United (26 December 2020) |
| Biggest away win | 4 goals difference Sakaeo 1–5 Bankhai United (4 November 2020) Chanthaburi 1–5 Marines Eureka (19 December 2020) |
| Highest scoring | 9 goals Pluakdaeng United 7–2 Pattaya Discovery United (11 October 2020) |
| Longest winning run | 7 matches Bankhai United Pluakdaeng United |
| Longest unbeaten run | 8 matches Chachoengsao Hi-Tek |
| Longest winless run | 8 matches ACDC Chanthaburi Royal Thai Fleet Sakaeo |
| Longest losing run | 6 matches Royal Thai Fleet |
2021–22 → | |
The 2020–21 Thai League 3 Eastern 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 12 teams located in Eastern of Thailand will compete in the league of the Eastern 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.