On 23 July 2025, H.E. Mr. Maris Sangiampongsa, Minister of Foreign Affairs, discussed with H.E. Mr. António Guterres, Secretary-General of the United Nations, during the High-Level Political Forum on Sustainable Development 2025 (HLPF) at the United Nations Headquarters.

Minister Maris reaffirmed Thailand’s commitment to strengthening its partnership with the United Nations in advancing global and regional efforts for sustainable development. To this end, he expressed Thailand’s readiness to share its experiences and best practices to support development efforts in other countries.  Both sides also exchanged views on regional peace and security, including the situation in Myanmar.

On this occasion, the UN Secretary-General expressed appreciation for Thailand's hosting of and continued support for United Nations agencies based in Thailand, while Minister Maris reiterated Thailand's readiness to work with the UN Secretariat as well as the UN Economic and Social Commission for Asia and the Pacific (ESCAP) in supporting the ongoing UN reform efforts.