 |
| Season | 2019 |
|---|---|
| Dates | 9 February 2019 – 29 September 2019 |
| Champions | Final stage Khon Kaen United Regional stage Khon Kaen United (Upper Region) Nakhon Pathom United (Lower Region) |
| Promoted | Khon Kaen United Nakhon Pathom United Phrae United Ranong United |
| Relegated | Marines Eureka (Upper Region) Royal Thai Army (Lower Region) Surat Thani (Lower Region) |
| Matches played | 326 |
| Goals scored | 863 (2.65 per match) |
| Top goalscorer |  Natan Oliveira(19 goals) |
| Biggest home win | 6 goals difference Nakhon Pathom United 6–0 Surat Thani (8 September 2019) |
| Biggest away win | 7 goals difference Sakaeo 0–7 Bangkok (11 May 2019) |
| Highest scoring | 9 goals scored Nakhon Pathom United 7–2 Royal Thai Army (21 August 2019) |
| Longest winning run | 8 matches Phrae United |
| Longest unbeaten run | 20 matches Nakhon Pathom United |
| Longest winless run | 21 matches Surat Thani |
| Longest losing run | 8 matches Surat Thani |
| Highest attendance | 6,391 Khonkaen United 2–1 Nakhon Pathom United (29 September 2019) |
| Lowest attendance | 22 Chiangrai City 1–1 Ayutthaya (10 August 2019) |
| Total attendance | 184,825 |
| Average attendance | 542 |
← 2018 2020–21 → | |
The 2019 Thai League 3 is the third season of the Thai League 3, the third-tier professional league for association football clubs in Thailand, since its establishment in 2017, also known as Omsin League Pro due to the sponsorship deal with Government Savings Bank (Omsin Bank). A total of 28 teams would divided into 2 regions including 14 teams in the upper region and 14 teams in the lower region.