The National Championship was the next stage from the regional stage of 2023–24 Thai League 3. The winners and runners-ups of each region would qualify for this round to find 3 clubs promoting to 2024–25 Thai League 2.
Teams
TeamQualifying methodPhitsanulok UnityNorthern region championsMaejo UnitedNorthern region runners-upSisaket UnitedNortheastern region championsMahasarakham SBTNortheastern region runners-upSaimit Kabin UnitedEastern region championsBankhai UnitedEastern region runners-upPTU Pathum ThaniWestern region championsAngthongWestern region runners-upSongkhlaSouthern region championsPhatthalungSouthern region runners-upBangkokBangkok metropolitan region championsNorth Bangkok UniversityBangkok metropolitan region runners-up
Group stage Upper region
Lower region
Knockout stage Winners, runners-up, and third place of 2023–24 Thai League 3 would be promoted to the 2024–25 Thai League 2.
Third place play-offs Summary
Matches
Mahasarakham SBT won 3–2 on aggregate.
Finals Summary
Matches 1st leg
Lineups:GK 18 Adisak LambelsahCB 6 Piyanath ChanrumCB 5 Pakornkiat Kaena CB 38 Heman KittiamphaipruekRM 77 Pongsak Boonthot (c)CM 52 Sutee Chantorn CM 32 Panigazzi Matías IgnacioLM 72 Pisek Soontonwat RF 7 Wongsakorn SaenruechaCF 9 DaniloLF 10 Isaac Honore Aime Mbengan Substitutes:GK 25 Rapeepat NasoongchonDF 23 Khritmat SompenDF 35 Wanthana ChaisawanMF 4 Kittiphop TaewsawaengMF 11 Phattharapong Phengchaem MF 17 Witthaya KantongMF 37 Nitipat KansornMF 47 Nonthawat Chaotai MF 79 Tiwa PiwsaiHead Coach: Narongthanaphon Choeithaisongchodok Lineups:GK 45 Yannasit SukcharoenRB 36 Sitthichok Mool-onCB 14 Sakda Koomgun (c) CB 5 Kittitach PranithiLB 3 Thananat Rungrampan DM 17 Phattharaphol KhamsukDM 35 Siripong KongjaophaRM 10 Wichaya Pornprasart CM 8 Seiya Kojima LM 56 Carlos Eduardo CF 25 EydisonSubstitutes:GK 99 Natthasan PakkaranoDF 26 Supakorn Nutvijit DF 37 Phubordee BuangamMF 19 Wachirawut Phudithip MF 24 Rattapoom LonlueMF 34 Napat TangthanapholkulFW 11 Phootran Gingpan FW 22 Sirodom KonsungnoenFW 23 Kiangsak TaobutrHead Coach: Kissakorn Krasaingoen
2nd leg
Lineups:GK 45 Yannasit Sukcharoen RB 36 Sitthichok Mool-onCB 14 Sakda Koomgun (c) CB 5 Kittitach Pranithi LB 3 Thananat RungrampanDM 17 Phattharaphol KhamsukDM 35 Siripong Kongjaopha RM 10 Wichaya Pornprasart CM 8 Seiya Kojima LM 56 Carlos Eduardo CF 25 Eydison Substitutes:GK 99 Natthasan Pakkarano DF 4 Banjong Phadungpattanodom DF 26 Supakorn NutvijitDF 37 Phubordee BuangamMF 24 Rattapoom Lonlue MF 34 Napat TangthanapholkulFW 9 Woraphot Somsang FW 11 Phootran Gingpan FW 22 Sirodom KonsungnoenHead Coach: Kissakorn Krasaingoen Lineups:GK 18 Adisak LambelsahRB 77 Pongsak Boonthot (c)CB 6 Piyanath ChanrumCB 5 Pakornkiat KaenaLB 38 Heman KittiamphaipruekDM 4 Kittiphop TaewsawaengDM 23 Khritmat Sompen RM 7 Wongsakorn Saenruecha AM 32 Panigazzi Matías Ignacio LM 10 Isaac Honore Aime Mbengan CF 9 Danilo Substitutes:GK 25 Rapeepat NasoongchonDF 3 Kritsada UtamakunDF 35 Wanthana ChaisawanMF 11 Phattharapong Phengchaem MF 16 Chatchai Boonnuk MF 17 Witthaya KantongMF 37 Nitipat Kansorn MF 47 Nonthawat ChaotaiMF 79 Tiwa Piwsai Head Coach: Narongthanaphon Choeithaisongchodok
Bangkok won 3–2 on aggregate.
Statistics
Goalscorers
Teams promoted to 2024–25 Thai League 2 Bangkok (champions) Sisaket United (runners-up) Mahasarakham SBT (third-placed)
References