The Indus Waters Treaty (IWT) has now attained the milestone of 60 years (1960– 2020). It has become a global role model of an international legal mechanism for shared transboundary water resources. It has withstood all the strains, conflicts and lows in the bilateral relations between the riparian states of India and Pakistan. The current trends of global climate change in the Anthropocene age have exacerbated the risk of conflict over the shared international freshwater resources under the IWT. The receding glaciers, scanty snowfall, changing land system patterns, increasing demands for water to meet irrigation, industrial and domestic water demands, all have cumulatively made an impact on water availability in the shared Indus Basin. The study seeks to analyze the actual working of the IWT, efficacy of the in-built conflict resolution mechanism and the sheer tenacity to stay course especially on the part of the large upper riparian country, India. It, in turn, has become an exemplar in a treaty-based mechanism as well as in making hydro-diplomacy work for shared transboundary water resources in the era of climate change.