Thai League 1 cannot restart before September as contact sports remain prohibited under the government's new guidelines.
The Centre for Covid-19 Situation Administration (CCSA) on Friday further eased coronavirus lockdown restrictions.
Shopping malls, convention centres and beauty salons, among other businesses, are allowed to reopen from tomorrow after a decline in new coronavirus cases and deaths.
In the second phase of relaxation measures, non-contact sports with no more than three players per team and without spectators are allowed such as badminton, sepak takraw, table tennis, squash and fencing.
Boxing stadiums and bowling alleys will remain closed.
The announcement effectively ends the Football Association of Thailand's (FAT) hopes for the league season to resume before September.
FAT acting secretary-general Patit Supaphong said the CCSA had already informed the body of yesterday's measures.
"We must act according to the CCSA's guidelines," he said.
"The safety of the players and involved parties are the most important thing."
The Thai League 1 season was suspended in March after four round of matches due to the Covid-19 pandemic.
Clubs then unanimously agreed for the competition to resume in September.
However, FAT president Somyot Poompunmuang said this week the season could restart before September if the government gave the green light.
"The league will now resume in September," Patit said.