Prime Minister Ranil Wickremesinghe left for a three-day visit in Singapore, sources close to him said.
A spokesman from his office confirmed that the Prime Minister would attend several meetings in Singapore.
Meanwhile, former Defence Secretary Gotabhaya Rajapaksa is also in Singapore currently, recovering from a surgery at the Mount Elizabeth Hospital.
It is not immediately clear whether the Prime Minister will visit the former Defence Secretary at the Mount Elizabeth Hospital.
The Prime Minister is expected to return to the country on June 14.