Thai authorities confirmed that they would not accept any ship carrying migrants, the media reported on Friday.
The announcement comes one day after the Thai navy turned back a ship carrying at least 300 Bangladeshis and Ronhingyas.
Panitan Wattanayagorn, adviser to the Thai government, said the government will stick to the policy until the May 29 meeting on migration crisis with representatives from Australia, Indonesia, Malaysia, Myanmar, Bangladesh, Vietnam and international organizations, the Bangkok Post daily reported.
Weerapong Nakpradit, a Thai navy official, said on Thursday that water, food and medicine had been supplied to a ship carrying dozens of men, women and children, and help to repair the boat's engine was offered so it could continue its journey outside Thai waters.
According to media reports, the ship was turned away a day earlier by Malaysian authorities, where the asylum seekers had planned to disembark.
Phil Robertson, deputy Asia director at Human Rights Watch, criticized Thailand's decision to turn away the boat and asked Thai, Malaysia and Indonesian navies to stop playing a three-way game of "human ping-pong" with the lives of the migrants.
According to the U.N. Refugee Agency, some 25,000 migrants left Bangladesh and Myanmar on boats in the first quarter of 2015, twice as many as in 2014.
After accepting some 1,500 asylum seekers on Sunday and Monday, Indonesia and Malaysia have turned away at least three boats carrying hundreds of Bangladeshis and Rohingyas, a persecuted Muslim minority of Myanmar.
The number of migrants in the region has increased drastically since early May, when Thailand launched a campaign against human-trafficking.