Jadet Meelarp was appointed as coach of struggling Thai League 1 side Port yesterday, the club announced.
It is Jadet's fourth stint as coach of the club.
Port were contenders for the Thai League 1 champions at the end of last year.
But they have gone downhill since the 2021-22 season resumed last month and were also eliminated in the FA Cup and the League Cup.
Two weeks ago, Sarawut Treephan quit as coach.
Interim coach Weerayut Binabdullohman's spell lasted only one game -- Port's embarrassing 2-0 home loss to relegation contenders Samut Prakan.
The club said Jadet was brought back because the team have to play in an AFC Champions League play-off match against South Korea's Ulsan Hyundai on March 15.
Jadet holds a coaching licence as required by the Asian Football Confederation (AFC).
However, it is unclear if he has received a long-term contract from Port.
Jadet is a member of the national team's coaching staff and he may return to the role after the match against Ulsan.
Nualphan Lamsam, Port chairwoman and manager of the Thai national team, will make a decision later.
Meanwhile, Chinese Super League side Changchun Yatai have withdrawn from this year's AFC Champions League, the AFC said.
Changchun were due to play the winners of the preliminary round meeting between Sydney FC and Kaya FC Iloilo from the Philippines.