"The president's engagements will strengthen the international resolve to confront the North Korean threat and ensure the complete, verifiable, and irreversible denuclearisation of the Korean Peninsula," it said in a statement.
There had been speculation earlier that Mr Trump would skip the Asean summit in Manila as his relationship with Philippine President Rodrigo Duterte had cooled after the latter's anti-American outbursts, but the White House is now saying he will attend the event on Nov 13 and 14.
The Asia Pacific Economic Coopperation (Apec) leaders' summit in Da Nang, Vietnam from Nov 6-11 is also on Mr Trump's itinerary.
Asian leaders who met with Mr Trump on the sidelines of the recent UN General Assembly meetings were said to have helped persuade the president that attending the Asean summit would be important for him, source from Bangkok Post.