In today's dynamic business environment, effective supply chain management is vital for maintaining competitive advantage. Supplier selection is a crucial aspect of “leagile supply chains”, ensuring alignment with lean and agile principles. This paper presents a comprehensive methodology using a recognized MCDM tool, MARCOS, to assess supplier suitability based on multiple criteria derived from existing literature. Moreover, the paper introduces a linguistic methodology by integrating MARCOS with the 2-Tuple Linguistic (2-TL) Model. This linguistic approach enhances decision-making by accommodating subjective assessments and linguistic preferences during the evaluation process. An extensive literature review encompassing lean and agile supply chains and supplier selection enlightens the study. A case study is conducted to validate the proposed methodology. The results and discussions provide practical insights into supplier selection for leagile supply chains. By understanding the fundamental principles of agility and leanness and applying the proposed methodology, organizations can strengthen their responsiveness, improve customer satisfaction, and gain a competitive advantage in the market. The paper offers valuable guidance to organizations aiming to build robust and adaptable supply chain networks in today's dynamic business environment, contributing to the field of agile supply chains.