International development cooperation, including official development assistance, continues to make a significant contribution to implementing the 2030 Agenda and realizing sustainable development in its three dimensions. Recent shifts and reductions of official development assistance amid changing political priorities have put development cooperation under stress, with official development assistance commitments still falling short. South-South cooperation is a complement to, not a substitute for, North-South cooperation, and has been expanding, as has triangular cooperation. Multilateral development banks, which are in a unique position to accelerate financing for sustainable development and to leverage shareholder contribution through their balance sheets, have taken significant steps to expand their financial capacity, enhance their development impact and address global challenges. But overall, development cooperation has not kept pace with rising and evolving needs of developing countries, especially in countries in special situations, as well as countries in conflict and post-conflict situations. Persistent poverty and inequality, food insecurity, disasters, adverse impacts of climate change, biodiversity loss, environmental degradation and other challenges are increasing demands on limited resources. Addressing growing fragmentation and lack of coordination is essential to respond to increasing transaction costs and uphold long-standing effectiveness principles. International development cooperation needs to reinforce developing countries’ capacities to achieve sustainable development, and address poverty eradication and hunger, catalyse the mobilization of other sources of finance, both public and private, and support countries to better manage transitions throughout their development process. This requires reinvigorating the development cooperation architecture – globally and in countries – as a basis for a more effective, inclusive, coherent and efficient cooperation and partnership that honours existing commitments, meets and adapts to emerging needs, prioritizes country leadership and local ownership, promotes transparency and mutual accountability, and focuses on sustainable development impact.