While the importance of mental health and its impact on overall health and well‐being has been widely recognized, there continue to be ongoing barriers to accessing mental health services. This is particularly poignant in countries in Southeast Asia (SEA) where there may be further stigma in accessing mental health services. As no reviews have been undertaken on this topic, this review aims to outline the barriers and enablers to access and utilization of mental health care services in SEA. Searches were undertaken in commercially produced and gray literature sources. Two independent reviewers screened the results. The data were then independently extracted, which was then collated and synthesized, using the Health Belief Model (HMB) as a framework. Twelve studies were included in the review. Under the HBM, barriers were grouped into: stigma, poor health literacy, internalized reasons, cultural beliefs, lack of training of health professionals, quality of service, and poor distribution of resources. Enablers included: social support, outreach services, structural stigma, self‐awareness, resources and information, accessibility and affordability, and positive attitudes and beliefs about health professionals. Those accessing mental health care in SEA are confronted by complex barriers and few enablers. Ongoing stigma and a distinct lack of resources pose the greatest challenges, which are even more amplified for those in rural areas and minority groups. A multifaceted strategy that improves the structures, processes, and outcomes of mental health is required within these communities.