A T3 team could registered five foreign players by at least one player from AFC member countries and at least one player from ASEAN 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 or ASEAN member countries (3+1).
Note : : players who released during summer transfer window; : players who registered during summer transfer window; ↔: players who have dual nationality by half-caste or naturalization.
Updated to match(es) played on 25 August 2018. Source: Thai League 3 Rules for classification: 1) Points; 2) Head-to-head; 3) Goal difference; 4) Goals scored;). (C) Champions; (P) Promoted; (Q) Qualified for the phase indicated; (R) Relegated
Positions by round
The table lists the positions of teams after each week of matches. In order to preserve chronological evolvements, any postponed matches are not included in the round at which they were originally scheduled, but added to the full round they were played immediately afterwards. For example, if a match is scheduled for matchday 13, but then postponed and played between days 16 and 17, it will be added to the standings for day 16.
^"Highest attendance". T3 official match report (Chachoengsao Hi-Tek 2–0 Muangkan United). 18 August 2018. Archived from the original on 26 August 2018. Retrieved 10 January 2022.
^"Lowest attendance". T3 official match report (Chiangrai City 1–1 Muangkan United). 30 June 2018.
^"Lowest attendance". T3 official match report (Chiangrai City 0–0 Kalasin). 28 July 2018.