The current study investigates the roles of Islamic cultural heritage, Islamic infrastructure development, and Islamic architecture towards Muslim tourist satisfaction, and Islamic tourism developments with the aim to guide practitioners with strategic interventions for fostering best practices and maximise the environmental, economics and socio-economic benefits for sustainable Islamic tourism development in Malaysia. A questionnaire survey with 251 responses was collected from tourists in Malaysia using a 5-point Likert scale with a non-probability purposive sampling technique for participant selection and recruitment, while the causal relationship between variables was examined using the PLS-SEM approach. Findings revealed that Islamic cultural heritage, Islamic infrastructure development and Islamic architecture have a significant effect on Muslim tourist satisfaction. This investigation employs Islamic cultural heritage, Islamic infrastructure development, and Islamic architecture to gain insight into customer satisfaction towards Islamic tourism in Malaysia.