"Thailand is not going to go through massive levels of trauma," he said. "When we look out at the next six months, there's no indication of wholesale cancellations."
Conferences and meetings, which are key revenue earners, had not been seriously impacted, the ministry said.
Sumate Sudasna, president of the Thailand Incentive and Convention Association, was quoted by Reuters as saying most large events had gone ahead, including an international surgery congress in Bangkok, at which only 100 of the 2,600 participants had cancelled.
"It's business as usual for Thailand," he added.
From January to Aug 23, 19.6 million visitors arrived in Thailand and the country generated income of 930 billion baht from their visits. The ministry earlier said it expected 2.2 trillion baht of tourism revenue from 28.8 million visitors for this year.