Suwat Sidthilaw, the ministry's permanent secretary, said on Saturday that foreign tourists who planned to visit Thailand may change their destinations to neighbouring countries, such as Malaysia and Singapore.
The Ratchaprasong Square Trade Association is closely monitoring the political situation but has confirmed that it will organise Christmas and New Year's celebrations, Mr Suwat said.
This year, Thailand is expected to welcome 26 million foreign tourists, lower than the target of 28 million. Tourist arrivals are expected to generate about 1.15 trillion to 1.17 trillion baht in revenue, lower than the target of 1.3 trillion baht, he said.
The ministry and the Tourism Authority of Thailand (TAT) will meet to fine-tune strategies to draw in more tourists after the protests ended.