Australia is a multicultural and linguistically diverse country. Despite the vital role of religion/spirituality in the mental health of people from culturally and linguistically diverse (CALD) backgrounds, it is not commonly included in their mental health care. A rapid review was conducted to critically evaluate the studies that identified relevant religious/spiritual aspects regarding mental health care for CALD communities. After a systematic search and screening, sixteen empirical studies were included. The findings of the review suggest that people from CALD backgrounds draw strength and comfort from their religion to support mental health. Religious/spiritual practices were identified as effective mental health strategies by CALD people. Religious leaders were noted to be important sources of mental health support and guidance for individuals from some CALD communities. Collaboration of religious leaders in the mental health care, and integration of religious/spiritual practices into mainstream mental health interventions, may improve mental health care for people with CALD backgrounds.