Agroecology is gaining increasing recognition at a global level, with countries establishing new policies or laws relating to agroecology. Moreover, the world-wide Agroecology Coalition was set up to foster the development of agroecology At the European level, the European Partnership for Agroecology Living Labs and Infrastructure is a notable programme that began in 2024. It includes the establishment of a network of living labs and the European Panel for the Transition to Agroecology, which aims to engage with policymakers and calls for funding projects in applied agroecological research.Agroecology is a holistic concept that embraces a diversity of interpretations, intentions, and realities dependent on the country, context, history, stakeholders, and socio-political environment. To scale up agroecology, it is critical to document and analyse its development in different contexts. This is a necessary step to attain larger insights about the state of play in agroecology, as well as to support its expansion and use at the policy level. The “Mapping of agroecology in Europe” is aimed to provide an overview of the reality of agroecology in different European countries. This third volume covers 9 new countries: Belgium, Czech Republic, Latvia, Luxembourg, Norwa, Poland, Slovakia, Serbia and Switzerland. This adds to the 24 countries already mapped in the first two volumes of the country report series (Wezel et al. 2023, 2024). This mapping is not intended to be exhaustive, but rather to provide an overview and key information to help build a common understanding of agroecology and its development at the European level.This volume identifies various initiatives, cases, examples, and programmes related to five different activity categories: Practice, Science, Movement, Living Labs, and Education and Training. Moreover, it provides an overview about the current state of agroecology in each country and the barriers and perspectives for the future development of agroecology in Europe. The mapping was carried out under the Agroecology for Europe (AE4EU) Horizon 2020 project and beyond, and through a LIFE operating grant. It involved many organisations and mappers who conducted research in European countries.