Data privacy was guaranteed by the Personal Data Protection Act of 2010. This law came into force in 2013 and is focused on data privacy specifically rather than privacy rights generally.

References:

https://thelawreviews.co.uk/title/the-privacy-data-protection-and-cybersecurity-law-review/malaysia Malaysia's Constitution of 1957 with Amendments through 2007: https://www.constituteproject.org/constitution/Malaysia_2007.pdf