The central bank's monetary policy committee next reviews monetary policy on June 18 after voting 6-1 to hold the policy rate at 2.0 percent at its last meeting in April.
The economy will still grow this year, but not much, Bank of Thailand Governor Prasarn Trairatvorakul told reporters.
The central bank has forecast economic growth of 2.7 percent for this year, but it will review that forecast at the rate meeting.