2019 Thai League 3 Lower Region

2019 Thai League 3 Lower Region is the 3rd season of the Thai football league. It is a part of the Thai League 3 and the feeder league for the Thai League 2. A total of 14 teams will compete in the league this season.

Promoted clubs
Two clubs were promoted from the 2018 Thai League 4
 * Nakhon Pathom United
 * North Bangkok University

A clubs were promoted to the 2019 Thai League 2
 * MOF Customs United

Relegated clubs
A club was relegated to the 2019 Thai League 4 Bangkok Metropolitan Region
 * Deffo

A club was relegated from the 2018 Thai League 2
 * Krabi

Moved clubs

 * Simork were moved into the Upper Region.

Renamed clubs

 * WU Nakhon Si United renamed Nakhon Si United

Top scorers

 * As of 8 September 2019.

Attendance by home match played
Source: Thai League 3

Note: Unk.1 Some error of T3 official match report 14 July 2019 (Ranong United 1–1 BTU United).