On October 26, 2025, a red-and-black flag went up in Kuala Lumpur next to the ten already flying for ASEAN’s members. East Timor, officially Timor-Leste, had become the bloc’s 11th member and its first new entrant in almost 25 years.
“This is a dream realised,” Prime Minister Xanana Gusmão told fellow leaders at the ASEAN Summit. “It is not the end of our journey — it is the beginning of an inspiring new chapter.” President José Ramos-Horta, the Nobel Peace Prize laureate who lobbied for independence from exile, called membership “a strategic goal I spoke of in the 1970s, when we had nothing but conviction and hope.”
Under Malaysia’s 2025 chairmanship, leaders at the 47th summit signed the Declaration on the Admission of Timor-Leste.
A long road in
The Portuguese colony declared independence in 1975 and was invaded by Indonesia days later. The resistance, led by Gusmão in the mountains and Ramos-Horta at the United Nations, lost more than 100,000 lives over nearly a quarter-century. After a UN-supervised referendum in 1999 produced an overwhelming vote for independence, pro-Indonesian militias burned much of the country. On May 20, 2002, Timor-Leste became the first new sovereign state of the twenty-first century.
It applied to ASEAN in 2011. Some members, Singapore among them, doubted that a young, oil-dependent state with limited bureaucratic capacity could handle hosting hundreds of meetings and aligning on trade rules. Things moved in 2022, when leaders in Phnom Penh agreed “in principle” to admit it and gave it observer status. A 2023 roadmap set out what Dili still had to build.
What membership has to deliver
The economy is the hard part. Timor-Leste leans heavily on oil revenue, the Bayu-Undan gas field that funds most public spending is depleted, and the Greater Sunrise project is stuck in disputes with Australia over pipelines and profit-sharing. An analysis in Eurasia Review says the sovereign wealth fund could begin shrinking within a decade.
Inside ASEAN, the country gains access to a market of 650 million people and an economy worth nearly US$4 trillion. The bloc and its partners have started training Timorese civil servants in areas from customs procedures to food safety and disaster response. Dili has created ASEAN coordination units in every central ministry and sent officials to Laos and Malaysia to learn how meetings are run.
Malaysian officials say Timor-Leste has met six of the seven key readiness criteria in the 2023 roadmap. The one left is hosting capacity. If the usual alphabetical rotation holds, the country could chair ASEAN sooner than expected.
One Timorese civil-society leader put the arrangement this way: “It’s a bit like enrolling in a regional school — now we have to do the homework.”
Opposition and applause
Myanmar’s junta reportedly tried to block the admission, accusing Dili of supporting the parallel National Unity Government, which opposes military rule. ASEAN went ahead anyway.
Indian Prime Minister Narendra Modi was among the first to congratulate Timor-Leste, calling the moment “historic and heart-warming.” In a statement from New Delhi he said India believes the membership “will strengthen ASEAN’s unity and centrality and deepen regional cooperation.”
