[3] Four club was promoted from the 2016 Thai Division 2 League Northern Region Five club was promoted from the 2016 Thai Division 2 League North Eastern Region Four club was promoted from the 2016 Thai Division 2 League Central Region Three club was promoted from the 2016 Thai Division 2 League Central Region The number of foreign players is restricted to five per T3 team.

Updated to games played on 16 September 2017Source: Thai League 3 Source: Thai League 3 Note:Unk.1 Some error of T3 official match report 19 February 2017 (Lamphun Warrior 2–0 Ubon Ratchathani).

[28] Unk.2 Some error of T3 official match report 30 April 2017 (Kamphaengphet 3–1 Singburi Bangrajun).

[29] Unk.3 Some error of T3 official match report 2 July 2017 (Chachoengsao 5–0 Kamphaengphet).

[30] Unk.4 Some error of T3 official match report 12 August 2017 (Ayutthaya 1–0 Lamphun Warrior).