After rain caused havoc in large parts of Vietnam, Football Association of Thailand president Mr Worawi Makudi and Vietnamese Football Federation (VFF) chief Mr Nguyen Trong Hy decided to postpone the match.
Thailand just need a draw to win the title after defeating North Korea 1-0 last Tuesday.
North Korea and Vietnam played out a 0-0 draw on Thursday. The winning team will take home US$40,000.
Meanwhile, The Bangkok Post states that the Thai national team is set to return home today and leave for Saudi Arabia on Thursday for a friendly on Saturday.