Introduction: With a growing number of treatment options for localised kidney cancer, patients and health care professionals have both the opportunity and the burden of selecting the most suitable management option. This mixed method systematic review aims to understand the barriers and facilitators of the treatment decision-making process in localised kidney cancer. Methods: We searched PubMed, Embase, and Cochrane Central databases between 1st of January 2004 and 23rd of April 2020 using the JBI Manual for Evidence Synthesis and the Preferred Reporting Items for Systematic Review and Meta-analysis statement. We identified 553 unique citations, of these 511 were excluded resulting in 42 articles included for synthesis. The Purpose, Respondents, Explanation, Findings and Significance and the Strengthening the Reporting of Observational Studies in Epidemiology checklist were applied. Results: The key themes describing barriers and facilitators to treatment decisionmaking were identified and categorised into three domains: (1) kidney cancer specific characteristics; (2) decision-maker related criteria; and (3) contextual factors.The main facilitators identified within these domains were: size at diagnosis, age, comorbidities, BMI, gender, nephrometry scoring systems, biopsy, socio-economic status, family history of cancer, year of diagnosis, geographic region and practice pattern. The key barriers were race, gender, patient anxiety, low confidence in diagnostic and treatment options, cost of procedure and practice patterns.