Nationally Determined Contributions (NDCs) are a key component of countries’ climate action. In Bangladesh, Nepal and Sri Lanka, the NDCs on adaptation play a key role as they are developing countries with low greenhouse gas (GHG) emissions, but highly vulnerable to climate change. This research focuses on the NDCs on adaptation in three countries, and the gaps in policy, institutional structure, capacity and support for the implementation of these NDCs. The research will analyse the links between the NDCs, the National Adaptation Plans, and the integration of Sustainable Development Goals (SDGs) to the NDCs process of each country, and provide a comparative analysis with identified recommendations and lessons learnt for knowledge sharing. It further analyses the availability of monitoring and evaluation processes for the implementation of NDCs on adaptation, entry points for climate-proof budgeting processes, available support for adaptation finance, and availability of policies and strategies for gender sensitising the implementation of NDCs on adaptation in each country.