<p>This research examines the barriers to implementing circular supply chains (CSC) in manufacturing firms, especially in emerging economies, for sustainable development. In this study, barriers and their corresponding solutions for efficient implementation of CSC are identified, evaluated, and prioritized. Through an extensive literature review and expert suggestion, 35 barriers and 25 solutions were identified. The evaluated weight of barriers is analyzed using the plithogenic-neutrosophic analytic hierarchy approach, and the suggested solutions are ranked by the Combined Compromised Solution (CoCoSo) method. The results indicate that "poor planning "and "lack of adoption of advanced technologies, such as IoT, AI, ML, and CPS," are the most important barriers to the implementation of CSC. On the other hand, it is found that "a lack of circularity in acceptance" and "lack of required skills and knowledge among the workforce and stakeholders" are considered the least important factors. Sensitivity analysis validates the findings and provides the necessary information to the managers, practitioners, and policymakers. An important gap in the literature has been bridged by examining barriers to CSC and prioritizing solutions in the context of emerging economies for sustainable development. The application of plithogenic-neutrosophic analytic hierarchy process is a novel method for analyzing complex problems related to the adoption of CSC.</p>