Abstract ` Regional Integration is a worldwide phenomenon since nations enormous or small alike have used this to react to worldwide challenges and advancements. They integrate because they would prefer not to miss out in the worldwide rivalry for export markets and foreign direct investment and because of the dynamics in multilateral trade negotiations, small countries fall back on Regional Integration to upgrade their bargaining influence and to increase some level of global political impact. Development of regional trading blocs like Economic Cooperation (EC), North American Free Trade Agreement (NAFTA), and South Asian Association for Regional Cooperation (SAARC), and so on has brought about reinforcing of trade relations between the countries specifically and world at large. Among these regional organizations Association of Southeast Asian Nations (ASEAN) is one of the most established regional groups in Southeast Asia, which tries to efficiently handle both its diversity and growth. ASEAN economies have the most astounding trade to GDP ratio in the developing world.