U.S. President Donald Trump announced that he will witness the signing of a landmark peace agreement between Thailand and Cambodia immediately upon his arrival in Malaysia for the ASEAN Summit on Sunday.

Speaking from Air Force One aboard his flight to Kuala Lumpur, Trump confirmed on his Truth Social platform that he will attend the ceremonial signing alongside Thailand’s Prime Minister Anutin Charnvirakul and Malaysia’s Prime Minister Anwar Ibrahim. “I am on my way to Malaysia, where I will sign the great Peace Deal, which I proudly brokered between Cambodia and Thailand,” Trump posted. He also expressed condolences on the passing of Thailand’s Queen Mother Sirikit, noting, “I will be seeing their wonderful Prime Minister when we land. In order to accommodate everyone for this major event, we will be signing the Peace Deal immediately upon arrival.”

The agreement comes after months of tensions along the Cambodia–Thailand border, which erupted into the deadliest clashes in decades in July, claiming more than 40 lives and displacing around 300,000 people. The ceasefire brokered by Trump in July has since been reinforced through ongoing diplomatic efforts.

Thailand’s Prime Minister Anutin had initially delayed his departure to Malaysia due to the Queen Mother’s demise but insisted on attending the peace deal ceremony. In a local broadcast, he confirmed that the signing would be rescheduled for Sunday morning.

The peace agreement follows intensive negotiations under the Cambodia–Thai Joint Commission on Demarcation for the Land Boundary, which met on October 21–22 in Chanthaburi, Thailand. Key decisions were made to expedite and advance the border demarcation process, ensuring stability along the shared boundary.

The signing of this accord is expected to be a historic milestone for Southeast Asian diplomacy, symbolising reconciliation, regional stability, and the role of high-level mediation in resolving long-standing conflicts.