Research has found that training health care professionals can enhance the access of the culturally diverse community to appropriate mental health services. Yet, little research has been conducted that explicitly focuses on improving nursing knowledge, skills, attitudes, and behaviours that can enhance the access of the Culturally and Linguistically Diverse (CALD) community. This scoping review aims to locate, summarise, and recap what is known in the academic literature about educational interventions and programs to improve mental health nurses’ cultural competence. Examining how educational interventions and programs can improve mental health nurses’ knowledge, skills, attitudes, and behaviours to facilitate Culturally and Linguistically Diverse (CALD) community access to mental health services can also identify gaps in knowledge to report future research areas. Fifteen studies included in the review reported a positive effect of cultural competence interventions; however, it was difficult to establish a single effective intervention method due to the significant heterogenicity in cultural competence intervention strategies. Most studies in this scoping review included nurses as participants. However, only one study solely focussed on cultural competence intervention for mental health nurses. Two other studies included mental health nurses as participants, along with other mental health professionals. Henceforth, there is a prerequisite for more research focussing on enhancing mental health nurses’ cultural competency. Additional research is required to evaluate educational interventions’ impact on improving cultural competence attributes on specific practitioner behaviours and the effects on health care and health care outcomes. This review can form a basis for future research studies that will emphasise the impact of cultural competence interventions for mental health nurses.