The National Championship was the next stage from the regional stage of 2022–23 Thai League 3. The winners and runners-ups of each region would qualify for this round to find 3 clubs promoting to 2023–24 Thai League 2.
Teams
TeamQualifying methodPhitsanulokNorthern region championsUttaradit SaksiamNorthern region runners-upMahasarakham SBTNortheastern region championsSisaket UnitedNortheastern region runners-upPattaya Dolphins UnitedEastern region championsChanthaburiEastern region runners-upDragon Pathumwan KanchanaburiWestern region championsSamut SongkhramWestern region runners-upSongkhlaSouthern region championsMH Nakhon Si CitySouthern region runners-upNorth Bangkok UniversityBangkok metropolitan region championsBangkokBangkok metropolitan region runners-up
Group stage Upper region
Lower region
Knockout stage Winners, runners-up, and third place of 2022–23 Thai League 3 would be promoted to the 2023–24 Thai League 2.
Third place play-offs Summary
Matches
Dragon Pathumwan Kanchanaburi won 3–2 on aggregate.
Finals Summary
Matches 1st leg
Lineups:GK 22 Jaturong SamakornRB 24 Niras Bu-nga (c) CB 15 Thanakij Khanakai CB 20 Phanuphan ChankaewLB 39 Akarawit SaemaramRM 7 Adithep Chaisrianan CM 77 Attapon Chommaleethanawat LM 21 Boubacar KonéRF 10 André Luís CF 23 Somsak MusikaphanLF 66 Sanan Samala Substitutes:GK 25 Chayanon KraimasDF 3 Sunchai KongtongDF 18 Pongsakorn KlinsaowakonDF 27 Supakon PhetratMF 5 Suphakrit Matthochedi MF 91 Peerapat Kantha FW 11 Natdanai Makkarat FW 17 Satawat Sakprom FW 29 Aek-aroon YodsuwanHead Coach: Alongkorn Thongaum Lineups:GK 35 Sarawut KonglarpRB 8 Yannarit Sukcharoen CB 17 Nattapol HothongCB 5 Alex FlávioLB 25 Kitinun Suttiwiriyakul (c) DM 26 Natithorn Inntranon DM 23 Jirawat Chingchaiyaphum RM 22 Nattawut Dantrawen AM 78 Kongphop Luadsong LM 33 Caio Rodrigues da CruzCF 91 Luan Santos Substitutes:GK 1 Rattanachat NeamtaisongDF 4 Kullawat Silae DF 55 Kerkpol Kamkawang MF 3 Punnapob NamanuMF 10 Visit ChuenvanonMF 30 Weerapat Kaewongsa MF 79 Thanadon Supaphon FW 13 Supot JodjamFW 24 Charin BoodhadHead Coach: Chawapol Kamolsil
2nd leg
Lineups:GK 35 Sarawut KonglarpRB 22 Nattawut DantrawenCB 17 Nattapol HothongCB 5 Alex FlávioLB 25 Kitinun Suttiwiriyakul (c)DM 78 Kongphop Luadsong RM 13 Supot Jodjam CM 23 Jirawat Chingchaiyaphum CM 26 Natithorn Inntranon LM 33 Caio Rodrigues da CruzCF 91 Luan SantosSubstitutes:GK 1 Rattanachat NeamtaisongDF 4 Kullawat Silae DF 55 Kerkpol Kamkawang MF 3 Punnapob Namanu MF 6 Wasan MalaMF 30 Weerapat Kaewongsa MF 79 Thanadon Supaphon MF 96 Kaison RoungreangFW 24 Charin BoodhadHead Coach: Chawapol Kamolsil Lineups:GK 22 Jaturong SamakornRB 24 Niras Bu-nga (c)CB 26 Thanawut KlinsukonCB 20 Phanuphan ChankaewLB 39 Akarawit Saemaram DM 21 Boubacar KonéRM 10 André Luís CM 8 Atit Daosawang CM 93 Dennis Buschening LM 9 Ryo TomigaharaCF 7 Adithep Chaisrianan Substitutes:GK 25 Chayanon KraimasDF 27 Supakon PhetratDF 66 Sanan Samala MF 5 Suphakrit Matthochedi MF 77 Attapon Chommaleethanawat MF 91 Peerapat KanthaFW 11 Natdanai MakkaratFW 17 Satawat SakpromFW 23 Somsak Musikaphan Head Coach: Alongkorn Thongaum MH Nakhon Si City won 2–1 on aggregate.
Statistics
Goalscorers
Teams promoted to 2023–24 Thai League 2 Chanthaburi (runners-up) Dragon Pathumwan Kanchanaburi (third-placed) Pattaya Dolphins United (fourth-placed)
References