New frontiers of Southeast Asian space diplomacy

Southeast Asian countries were formerly peripheral to debates on space governance. They had nascent space programs and modest capabilities, and their policy interests focused largely on civilian applications.
But this is changing. Growing reliance on space-based infrastructure for national development, disaster resilience and connectivity has pushed countries to take a more proactive role in shaping the global space agenda. The April 2025 session of the United Nations Open-ended Working Group (OEWG) on the prevention of an arms race in outer space marked a turning point—one in which Southeast Asian voices were heard more clearly than ever.
While Southeast Asia is not formal bloc in space diplomacy, a shared regional voice is emerging. Most countries in the region consistently advocate for the peaceful use of outer space, oppose its weaponisation and emphasise that space must remain accessible to all states regardless of their size or level of technological sophistication. Joint statements from the Association of Southeast Asian Nations have underscored these shared principles, calling for multilateralism, transparency and inclusive development in space. The region increasingly presents itself as a consensus-driven and rule-abiding constituency committed to responsible space governance, even as individual countries build their capabilities.
This growing unity of voice coexists with posture variation between states. Indonesia, for example, has long advocated for legally binding mechanisms. In statements at the OEWG and other forums, it has warned that voluntary norms must not substitute for treaty-based regimes. Indonesia has consistently framed space as a peaceful, shared domain and opposed its weaponisation. Yet it also recognises the domain’s strategic value. Jakarta’s defence policy calls for the development of military space capabilities, and the government is exploring a national space command. These dual commitments—normative leadership and strategic readiness—mirror Indonesia’s broader foreign policy tradition of balancing principle with pragmatism.
This was seen in Indonesia’s October 2024 statement on behalf of the Non-Aligned Movement (NAM). While reiterating peaceful intentions, it also referenced the draft treaty on the Prevention of the Placement of Weapons in Outer Space. The controversial proposal—backed by China and Russia—is not supported by all NAM members. The reference suggested Indonesia’s willingness to push for ambitious legal outcomes, even at the risk of internal divergence.
Malaysia has taken a similarly principled yet institutionally focused path. Its 2022 Space Board Act established a domestic regulatory framework and prohibited the deployment of weapons in space—an unusual step for an emerging space actor. Internationally, like Indonesia, Malaysia has advocated for transparent and inclusive negotiations on a binding arms-control mechanism. But it has been more specific, having stressed the need to regulate space technologies, especially given their dual-use nature. While Malaysia advocates for transparency in military use of space, they do argue that such activities must not compromise national sovereignty.
The Philippines, though relatively new to the space domain, has emerged as one of the region’s most normatively ambitious players. Despite its limited capabilities, Manila contributed substantively to the OEWG, including a working paper on the principle of ‘due regard’. With Germany, it highlighted emerging threats such as kinetic anti-satellite weapons, directed energy weapons, and cyber intrusions. It also raised concerns over proximity operations conducted without consent—an issue of growing relevance as on-orbit manoeuvrability increases. The Philippines’ interest in the US-led Artemis Accords and its alignment with transparency, confidence-building measures and legal frameworks reflect its broader diplomatic tradition: rules-based, West-aligned and institutionally driven.
Singapore, Thailand and Vietnam round out the region’s increasing engagement in space diplomacy. Singapore has been a pragmatic bridge-builder, supporting voluntary norms while being open to long-term legal mechanisms. At the OEWG, it voted for resolutions backed by Western powers and the NAM, calling for convergence and cautioning against fragmentation. Thailand and Vietnam have shown similar pragmatism. Thailand has encouraged international legal models that promote equitable technology and data sharing, while Vietnam has endorsed transparency measures and reaffirmed its opposition to weaponisation.
These differences in approach do not amount to disunity. Rather, they underscore a maturing regional diplomacy in which Southeast Asian states pursue shared normative goals through varied means. Importantly, ASEAN has helped foster this cohesion. Through joint statements and informal coordination, regional mechanisms have enabled countries to articulate common positions anchored in peace, equity, and legality, while also maintaining national flexibility.
Many Southeast Asian states still fear that the space domain could become another theatre for strategic competition. Their preference remains for inclusive, consensus-based processes that preserve the centrality of the UN and resist hardening of rival blocs.
Southeast Asia may not be a unified actor in space diplomacy, but it is no longer on the margins. The region’s increasingly coordinated, principle-driven approach offers a middle path grounded in legalism, equity and multilateralism. As global rivalries extend into orbit, Southeast Asian perspectives are not just relevant—they are essential to a peaceful and rules-based space order.