The 2024–25 Thai League 3 Cup is the 2nd season of a Thailand's knockout football competition.
The phase adopts a single-elimination format, starting from the Round of 16, followed by the quarter-finals, semi-finals, and the final.
All matches in the knockout phase are single-legged except for the semi-finals, which are played over two legs.
In the event of a tie in the semi-finals, the away goals rule applies, followed by penalty shootouts if necessary.
The final is played as a single-leg match to determine the tournament champion.