From April 1 tourists from Europe, the U.S. and Southeast Asian countries among others are only allowed to stay for 30 days without a visa, the National News Bureau of Thailand reported.
According to the Tourism Authority of Thailand, the visitors will be allowed one 30-day extension, meaning they can visit the kingdom for a maximum of 60 days.
Authorities did not offer any explanations for the change.
However, Thailand has recently stepped up its crackdown against tourists who overstay their visas.
In October last year they had increased the visa-free stay from 30 days to 45 as part of efforts to stimulate tourism post-Covid.
The country received 11 million foreign visitors last year, and eyes 30 million this year.