There is a dearth of research on how negative religious attitudes towards LGBTQ people inform professional practice. This paper reports on a scoping review of 70 selected studies from 25 different countries. It explores key issues and knowledge gaps regarding the delivery of services to LGBTQ adults by religious healthcare, social care and social work organisations and/or practitioners with faith-based objections to LGBTQ people and their lives. The review identified four main themes: 1) a close connection between religious affiliation and negative attitudes towards LGBTQ people, among both students and professionals; 2) a heightening effect of religiosity, particularly among Christian and Muslim practitioners/students; 3) educators’ religious attitudes informing curriculum design and delivery, and some highly religious students resisting and/or feeling oppressed by LGBTQ-inclusivity, if present; 4) examples of practice concerns raised by professionals and lay LGBTQ people. The article considers the ethical, practical, educational and professional standards implications, highlighting the need for further research in this area.