The Football Association of Thailand have demanded that Peter Reid makes known his intentions for the future.
The national coach has been indentified as Stoke City's first choice candidate for their vacant assistant manager post.
The former Leeds and Sunderland boss has been in contact with the Potters and had appeared set to complete a return to England.
He has been working at the Britannia Stadium on a temporary basis and has asked for permission to remain in Stoke for a further two weeks.
Thailand were of the understanding that Reid would have returned to his post in Asia by now and are growing tired at the uncertainty surrounding his stance.
Clear-cut answerPresident of the Thai FA, Worawi Makudi, recently met with the experienced coach during a visit to Manchester as a guest of the Football Association and insists promises made during those talks have since been broken.
"Peter told me that the Thai national team will be idle until November when they face Singapore home and away in the Asian Cup qualifying round. So he asked for permission to work with (Tony) Pulis for another two weeks," Makudi told the Bangkok Post.
"I told him that this would mean he did not honour the promise he made at the Manchester restaurant. The FAT and the Thai fans want him to come back.
"I want a clear-cut answer. He cannot do two jobs at the same time. He must be Thailand's coach on a full-time basis."
Thailand are set to resume their Asian Cup qualifying campaign against Singapore on 14th November before playing the return fixture in Bangkok four days later.