Timor Leste's (East Timor) dream was to join Asean as soon as possible. The reason is simple enough: Certain Asean members are not ready to have the world's youngest democracy stand among them. Truth be told, the real problem is that a timeframe to admit Timor Leste has not been set. Officials from Timor Leste also interned and received training from the secretariat and Asean members. Sooner or later, the reality on the ground will force Asean to make a political decision to admit Timor Leste.
Source: Bangkok Post May 20, 2019 21:56 UTC