The ministry now expects exports to grow only 0.2 percent this year, compared with 1.4 percent seen in January, Kritsada Jinavijarana, director-general of the Fiscal Policy Office, told a news conference.
He said the economy may have grown 3.2 percent in the first quarter from a year earlier. Official first-quarter GDP data will be announced by the state planning agency on May 18.
The military took power in a coup last May to end months of political turmoil but has been unable to revive the economy which expanded just 0.7 percent last year, the weakest pace since devastating flooding in 2011.