Question This review of reviews synthesises qualitative evidence on the experiences of receiving and providing care and treatment for mental health conditions in non-specialist settings in low-income and middle-income countries (LMICs), and the factors that influence the provision and uptake of such services. Study selection and analysis Database searches were conducted in PubMed/MEDLINE, EMBASE, PsycINFO, CINAHL, Scopus, African Index Medicus and Global Index Medicus, supplemented by screening repositories of systematic reviews protocols and contacting authors. The evidence synthesis drew on deductive and inductive approaches: a framework analysis approach was used for the initial coding structure, after which the results synthesis was refined further through reviewing and regrouping the initial coding through thematic synthesis principles. Findings Nine reviews met inclusion criteria and reported on a range of factors related to the provision and uptake of mental healthcare by non-specialist health workers in LMICs: (1) health worker competency, (2) availability of resources, (3) recipient-related and provider-related characteristics, (4) service accessibility, (5) sociocultural acceptability and (6) vulnerable groups for whom barrier to care were potentially exacerbated. Conclusions This review provides nuanced and contextualised insights regarding the experiences of receiving and providing care for mental health conditions in LMICs, including barriers influencing service provision and uptake. It is important to ensure mental healthcare in non-specialist settings in LMICs is delivered in a manner which is feasible, acceptable and culturally appropriate in order to improve access to care, reducing stigma and promoting better overall health and well-being for individuals and communities.