Product Service Systems (PSS) are seen as pivotal in driving the circular transition across the Nordics and the European Union. This project, "PSS in the Nordics," investigates the nuanced dynamics of PSS, exploring their potential for economic and environmental success in alignment with the overarching Nordic Vision to become the most sustainable and integrated region globally. PSS models integrate products and services, offering a unique form of provider ownership. It holds significant potential for circular and digital economies, reshaping consumption and ownership norms. However, the successful deployment of PSS relies on intricate considerations such as business model design, active steps to reduce material consumption and consumer acceptance. This project aims to clarify the potential environmental and socioeconomic benefits of PSS and the critical factors involved in their implementation. This report marks the culmination of the project's third phase, focusing on understanding the challenges and enablers surrounding PSS models in the Nordics. Building on the initial phases of gaining an overview of existing PSS models (Step 1) and identifying suitable product groups (Step 2), this report offers empirical insights into existing barriers, the regulatory landscape affecting Nordic PSS models, and practical tools, templates and guidance relevant to PSS providers. Incorporating inputs from over 40 stakeholders within the Nordic PSS landscape, in-depth policy assessments, and evaluations of relevant business development resources, this report delves into the examination of twelve prominent barriers, encompassing cultural, technical, economic, market, and regulatory domains.