Andersen’s Behavioural Model of Health Service Use (ABMHSU) is a multilevel model that helps understand the factors influencing health service access and utilisation. This framework is a widely used model for health service use in general, as well as in immigrant populations and vulnerable populations. ABMHSU, in this project, provided a framework to explain how the mental health nurses’ cultural competence can influence the Victorian CALD community members’ mental health care access and utilisation. A unique model of ABMHSU in the current multiple-method project provided a theoretical framework for examining the factors associated with people from the CALD community accessing mental health services in an Australian context to answer the research questions. The key findings of the research were discussed with reference to the extant literature and with triangulation of research results with the ABMHSU in the context of Victoria. The researchers argue that even though predisposing, enabling, and need factors are necessary to determine whether a person is selected for expert care for mental health issues, these factors alone are insufficient. Ongoing research is essential to ascertain the potential of mental health nurses’ cultural competence education and cultural responsiveness in addressing the mental health service access and utilisation of the heterogeneous CALD communities. Additional research is advocated to identify the supplementary factors, as there is a dearth of research exploring the potential of ABMHSU worldwide.