Bangladesh became the first South Asian country and the 56th globally to accede to the UN Convention on the Protection and Use of Transboundary Watercourses and International Lakes (UN Water Convention). With 57 transboundary rivers flowing through Bangladesh, including the Ganges-Brahmaputra-Meghna system, the move is strategically significant.

Bangladesh's accession gives it an international legal platform to negotiate for fairer water-sharing agreements, especially regarding the Teesta and Ganga rivers with India. India has not joined the Convention, viewing multilateral mechanisms cautiously due to concerns about externalizing bilateral water issues and losing negotiation flexibility. The move could reshape regional water diplomacy in South Asia.