3rd stakeholder group meeting regarding Public-Private Partnerships (PPPs) in the domains of industrial symbiosis and circular economy. The successful example of collaboration of Public and Private Sector in Waste Management PPP in the Region of Western Macedonia will be presented emphasizing on barriers and challenges related to this project. Stakeholders will provide information on areas that could progress towards resource efficiency via the utilisation of public-private partnership business agreements. Furthermore stakeholders will discuss the conclusions of 2nd SYMBI Interregional Workshop "Interregional workshop on how to plan and unlock public and private investments - How regional authorities can develop public-private partnerships to foster industrial symbiosis"recently took place in Kozani.