There also were no new deaths reported on Wednesday, leaving the country's total at 3,017 cases with 56 fatalities.
Since the beginning of May, Thailand has reported single-digit daily increases with the exception of May 4, when a cluster pushed the number to 18.
The last time Thailand reported no new cases was on March 9, when there were 50 cases in total with a single death.
Thai authorities have been selectively easing restrictions meant to combat the coronavirus. Bangkok restaurants were allowed to reopen last week for sit-in dining with social distancing. (AP) SCYSCY