Well, ASEAN is definitely not make up by three nations. Have you ever why a rich country like Singapore offer to give a hand to them and let them land temporary? For those who stay in the nations, we do know once they are in they will never go.
Just because these three nations are developing country, does not mean we should take up what the developed country don't want. So, before you tell us to accept them, do convince also other ASEAN countries to accept also. It is not right for us to take the burden solely when our people are heavily burdened.