The ASEAN's preventive diplomacy is the new phenomenon in the regional architecture concerning with the living and breathing modern miracle in ASEAN. It has been one of the most substantial scenarios for all nation states to utilize and benefit form in term of common national interest and to divert major conflicts in the area of peaceful cooperation. The challenging issue in ASEAN is triggering political and security regional become tremendous problem, so ASEAN wouldn't be ignorable and has to narrowly compromise those rising major issues, immediately. The South China Sea and the Rakhine State issues are the two common aspects undertaking and discussing urgently, and it will be an obstacle for ASEAN to move forward in ASEAN integration. The rises of China in Southeast Asia is also an area of concern for ASEAN's efforts at preventing conflict because the confidence building has illustrated little progress in last a few years-after the signed DOC in 2002 but the progressing negotiation on the COC is now difficult to be finalized. Whereas the Rakhine State issue in Myanmar is better understanding as the human rights concerns and ASEAN would appreciate the hard efforts between Myanmar and Bangladesh Governments. However, Rohingyas crisis is uncompromisingly facing crackdown by both parties on other matters. In this regard, ASEAN diplomacy is applied by its roles and encourages powerful actors to take action with regards to the signatory MoU between Myanmar Government, UNDP and UNHCR in 2018. Facilitating the process of the repatriation of the displaced persons, is a positive measure to achieve solution for the people in Rakhine State. These sensitive issues are struggling ASEAN to quickly move on to the sustainable development, and also concern to all ASEAN partners especially the United Nations and the United States of America.