Bangkok FC
Raj Pracha
Samut Prakan FC
Ang Thong FC
Chiangrai City FC
Assumption United
Kamphaeng Phet
Surin City FC
Muang Loei United
Khonkaen
Yasothon FC
Trang FC
Lamphun Warrior FC
Customs United
Hua Hin City
Krabi FC
Samut Sakhon
Sa Kaeo City FC
Surat Thani
Muangkan Utd
Ubon Ratchathani
Phitsanulok FC
Ayutthaya FC
Ranong United
Chanthaburi FC
Nara United
Samut Songkhram
BTU United
Phrae United
Simork FC
Ayutthaya United
Kalasin FC
Nakhon Pathom FC
Pattani FC
Bang Bueng United
Dome FC
Yala FC
Krung Thonburi FC
Sisaket FC
Uthai Thani FC
Phayao FC
Seemok FC
Nonthaburi FC
Singburi FC
Suphanburi FC
Navy FC
Udon Thani FC
Prachinburi United
Thai League 3 (Thai: ไทยลีก 3), commonly known as the T3, is the third level of Thai football. It was started in 2017 First season. It is sponsored by BYD Auto and therefore officially known as the BYD Dolphin League III. In 2017, the League is divided in 2 regions and participated by 32 clubs 1st-4th clubs from 8 regions which are former members Regional League Division 2 and debutants in the season.