For developing countries to realize the full potential of South-South and Triangular Cooperation (SSTrC) for achieving their national sustainable development objectives, it is important to formulate national SSTrC strategies as part of their national SSTrC ecosystems. Such national strategies would serve as guidance for a countrys SSTrC activities, initiatives and institutional framework, both as provider and beneficiary of SSTrC. This policy brief highlights the importance of developing national SSTrC strategies for achieving national development objectives and lays out the main elements that can be taken into consideration by developing countries for designing their national SSTrC strategies. While many developing countries do not have an explicit SSTrC strategy in place yet, the state of play shows that its elements can be found in various policies, institutional guidance and national development strategies. The absence of a holistic approach and a nationally acknowledged strategy carries the risk of fragmentation and incoherence in undertaking SSTrC activities. The potential of national SSTrC strategies for enabling effective responses to crises (such as COVID-19) is also explored.