This stage celebrates the enduring passion for football in Isan, where communities embrace the sport as a vital part of their regional identity and pride.

Roi Et PB United was promoted from the Thailand Semi-pro League and will make its debut in the Northeastern Region for the 2024–25 season.

[2] Sisaket United and Mahasarakham SBT achieved promotion to Thai League 2, having finished as the national runners-up and third place, respectively.

The distances between football clubs in the 2024–25 Thai League 3 Northeastern Region are approximate and calculated based on the most convenient and shortest practical road routes.

These measurements prioritize routes that balance proximity and ease of travel, avoiding too indirect or inconvenient paths despite their shorter distance.