Postsecular theory is developing in academic circles, including the psychiatric field. By asking what the postsecular perspective might imply for the secular discipline of psychiatry, the aim of this study was to examine the postsecular perspective in relation to the secular nature of psychiatry, by way of a narrative review. In a systematic search for literature, relevant articles were identified and analyzed thematically. Thirteen articles were included, and three intertextual themes were identified, which represented ongoing international dialogues in relation to psychiatry and religion—such as intervention, integration, identity, the religious or irreligious psychiatrist, and the multicultural setting of the discipline. Furthermore, the postsecular perspective reveals a (potential) bias against the religious worldviews inherent in the secular. Postsecular theory can contribute to the ongoing discussions of how psychiatry, as a secular discipline, approaches the religious in the lives of patients and psychiatrists.