| Competition: | Thai League 3 Bangkok Metropolitan Region |
| Season: | 2020–21 |
| Dates: | 3 October 2020 – 3 January 2021 |
| Continentalcup1: | |
| Continentalcup1 Qualifiers: | North Bangkok University Bangkok |
| Matches: | 140 |
| Total Goals: | 380 |
| Biggest Home Win: | 7 goals difference (18 November 2020) |
| Biggest Away Win: | 7 goals difference (10 October 2020) |
| Highest Scoring: | 9 goals (3 January 2021) |
| Longest Wins: | 9 matches North Bangkok University |
| Longest Unbeaten: | 14 matches Nonthaburi United S.Boonmeerit Prime Bangkok |
| Longest Winless: | 14 matches Inter Bangkok |
| Longest Losses: | 7 matches Royal Thai Air Force |
| Prevseason: | 2019 (T3), 2019 (T4) |
| Nextseason: | 2021–22 |
The 2020–21 Thai League 3 Bangkok metropolitan 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[1] and there is no relegation in this season.[2] A total of 14 teams located in Central and Bangkok Metropolitan Region of Thailand will compete in the league of the Bangkok metropolitan region.[3]
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.[4] The second-placed and the third-placed of the Bangkok metropolitan region have the similar points, so they must play-off to find a team to qualified to the national championship stage.
| Position | Province | Number | Teams | |
|---|---|---|---|---|
| align=center rowspan="1" | 1 | 6 | Chamchuri United, Grakcu Sai Mai United, Inter Bangkok, Kasem Bundit University, Prime Bangkok, and Thonburi United | |
| align=center rowspan="2" | 2 | 3 | Nonthaburi United S.Boonmeerit, Siam, and STK Muangnont | |
| 3 | Bangkok, North Bangkok University, and Royal Thai Air Force | |||
| align=center rowspan="2" | 3 | 1 | Royal Thai Army | |
| 1 | Samut Prakan |
| Team | Location | Stadium | Coordinates | |
|---|---|---|---|---|
| Bangkok | Bangkok University Stadium | |||
| Chamchuri United | Chulalongkorn University Stadium | |||
| Grakcu Sai Mai United | Grakcu Sai Mai Stadium | |||
| Inter Bangkok | 72nd Anniversary Stadium (Min Buri) | |||
| Kasem Bundit University | Kasem Bundit University Stadium | |||
| Nonthaburi Provincial Stadium | ||||
| North Bangkok University | North Bangkok University Stadium | |||
| Prime Bangkok | Ramkhamhaeng University Stadium | |||
| Royal Thai Air Force | Thupatemi Stadium | |||
| Royal Thai Army | Chulachomklao Royal Military Academy Stadium | |||
| Samut Prakan | Samut Prakan Stadium | |||
| Siam | Nonthaburi Provincial Stadium | |||
| STK Muangnont | Nonthaburi Youth Centre | |||
| Thonburi United | Thonburi Stadium |
A T3 team could register four foreign players by at least one player from AFC member countries. A team can use four foreign players on the field in each game, including at least one player from the AFC member countries (3+1).
Note :
: players who released during winter transfer window;
: players who registered during winter transfer window;
↔: players who have dual nationality by half-caste or naturalization.
→: players who left club after registered during first or second leg.
| Other foreign players. | ||
| AFC quota players. | ||
| No foreign player registered. |
| Club | Leg | Player 1 | Player 2 | Player 3 |
|---|---|---|---|---|
| Bangkok | 1st | |||
| 2nd | ||||
| Chamchuri United | 1st | |||
| 2nd | ||||
| Grakcu Sai Mai United | 1st | |||
| 2nd | ||||
| Inter Bangkok | 1st | |||
| 2nd | ||||
| Kasem Bundit University | 1st | |||
| 2nd | ||||
| 1st | ||||
| 2nd | ||||
| North Bangkok University | 1st | |||
| 2nd | ||||
| Prime Bangkok | 1st | |||
| 2nd | ||||
| Royal Thai Air Force | 1st | |||
| 2nd | ||||
| Royal Thai Army | 1st | |||
| 2nd | ||||
| Samut Prakan | 1st | |||
| 2nd | ||||
| Siam | 1st | |||
| 2nd | ||||
| STK Muangnont | 1st | |||
| 2nd | ||||
| Thonburi United | 1st | |||
| 2nd |
As of 3 January 2021.
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 |  Moussa Abakar | Prime Bangkok | 11 |
| 2 | Isaac Honore Aime Mbengan | Chamchuri United | 9 |
 Yeon Gi-sung | Chamchuri United | ||
 Teerasak Poeiphimai | Prime Bangkok | ||
| 5 |  Emmanuel Kwame Akadom | Grakcu Sai Mai United | 8 |
 Dicko Ibrahim Abou | Kasem Bundit University (4), Bangkok (4) | ||
| 7 | Bunlue Thongkliang | Bangkok | 7 |
| Woraphot Somsrang | Nonthaburi United S.Boonmeerit | ||
| Chanotaj Pipatmongkonchai | North Bangkok University |
| Player | For | Against | Result | Date | |
|---|---|---|---|---|---|
| Chanotaj Pipatmongkonchai | 7–0 (A) | ||||
| Teerasak Poeiphimai | 3–2 (H) | ||||
| 5–0 (H) | |||||
 Carlos Eduardo dos Santos Lima4 | 6–3 (A) |
As of 3 January 2021.
| Rank | Player | Club | Clean sheets |
|---|---|---|---|
| 1 | Sanan Amkoed | North Bangkok University | 10 |
| 2 | Supazin Hnupichai | STK Muangnont | 9 |
| 3 | Chitchana Thaksinpila | Kasem Bundit University | 7 |
| 4 | Nattapon Meesaeng | Nonthaburi United S.Boonmeerit | 6 |
| 5 | Kritchai Sangrung | Chamchuri United | 5 |
| Yutthasit Chatmueang | Prime Bangkok | ||
| Saree Rakpromrach | Samut Prakan |