Sexually diverse Muslim men (SDMM) are seen to present later and with more advanced symptoms of HIV and other sexually transmitted infections (STIs). The limited access to sexual healthcare services is attributed to the stigma associated with their multiple intersecting identities. We conducted a scoping review to synthesise research on barriers impeding SDMM’s access to sexual health care. We used Arksey and O’Malley’s five-stage framework as the methodology for the review. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses’ extension for scoping reviews, was used as a guide for the presentation of the results. Searches conducted in EBSCOhost, Scopus, MEDLINE, Embase, CINAHL, Global Health, and Google Scholar yielded 1382 results, of which 18 studies were deemed eligible for this review. Bronfenbrenner’s socioecological model was employed as a framework to analyse the studies. Through analysing the eligible studies, we identified factors operating at three different levels that can impede SDMM’s access to sexual health care. Limited awareness and low-perceived risk of HIV/STIs, coupled with the fear of sexual identity disclosure might act as individual-level barriers to sexually diverse Muslim men’s access to sexual health care. The experiences of discrimination within clinical settings were presented as a healthcare system-related issue discouraging SDMM from revisiting those services. Heteronormative and religious ideologies, homophobic government programs, and poverty might manifest in the more intimate domains of healthcare delivery, creating hostile spaces for SDMM. Intensive research and advocacy efforts are required to improve SDMM’s access to sexual health care, which can reduce their risk of HIV/STIs.