ASEAN Takes Lead as Malaysia Hosts Talks to Defuse Cambodia–Thailand Tensions

KUALA LUMPUR / PHNOM PENH (Dec. 21, 2025) — ASEAN moved to the forefront of regional diplomacy Sunday as Malaysia hosted high-level talks aimed at easing escalating tensions between Cambodia and Thailand, positioning the bloc as the central platform for dialogue and de-escalation.

Malaysian Prime Minister Anwar Ibrahim said he had spoken directly with the leaders of both Cambodia and Thailand to exchange views on reducing tensions. He stressed the need for dialogue, wisdom and mutual respect to preserve regional peace and stability.

Anwar said the ASEAN Foreign Ministers’ Meeting, set for Dec. 22 in Kuala Lumpur, would provide an “appropriate and constructive platform” for both sides to negotiate openly, resolve differences peacefully and work toward a lasting solution in line with the ASEAN Charter and the Treaty of Amity and Cooperation in Southeast Asia.

The meeting comes amid heightened concern over continued fighting along the Cambodia–Thailand border. ASEAN diplomats are expected to review recent developments and reaffirm the bloc’s commitment to resolving disputes through diplomacy rather than force.

Cambodian Prime Minister Samdech Thipadei Hun Manet reiterated his country’s adherence to the ceasefire, saying Cambodia remains guided by the principles of non-use of force and dialogue.

ASEAN’s efforts are being reinforced by parallel engagement from major powers. Deng Xijun, China’s special envoy for Asian affairs, visited Phnom Penh on Dec. 19 for talks with Cambodian leaders, underscoring Beijing’s support for an immediate ceasefire and its willingness to play a constructive role in facilitating dialogue.

International pressure has also intensified. The United States, United Nations and United Kingdom have issued renewed calls for de-escalation and protection of civilians. U.S. Secretary of State Marco Rubio urged Thailand to resume full implementation of the Kuala Lumpur Peace Accord, warning of Washington’s deep concern over continued violence.

The UN has raised alarm over potential violations of international humanitarian law. High Commissioner for Human Rights Volker Türk said he was deeply concerned by reports of fighter jets, drones and heavy artillery being used near populated areas, including villages and cultural and religious sites.

Cambodia’s Ministry of National Defence accused Thailand of continuing to violate the ceasefire agreement signed in October. Cambodian authorities said renewed shelling and cross-border military actions have pushed the civilian death toll to 19, including an infant, while more than 518,000 people have been displaced, most of them women and children.

As tensions persist, ASEAN’s diplomatic engagement — anchored by Malaysia’s mediation — has emerged as the primary regional mechanism to prevent further escalation.