The Global Alliance for Improved Nutrition (GAIN) and Wellspring Development designed and hosted a series of in-person and online consultations with partners of the Dutch Ministry of Foreign Affairs to examine challenges in improving the quality of diets of population groups living in rural areas of Low and Lower-Middle Income countries. These groups still largely consume nutrient-inadequate, even unhealthy, diets and face heavy burdens of malnutrition. This third paper out of six, looks specifically at the role of markets in improving nutrition at scale. The aim of the discussions was to gather examples of projects that have delivered success at scale, to understand the challenges involved and to identify important points of convergence in conceptualisation and action in future work.