Summary Context Clear guidelines on confidentiality and privacy are essential for those receiving treatment from mental health services and their families. Good mental health care also requires suitable supporting legislation. The United Nations Convention on the Rights of Persons with Disability (UN-CRPD) seeks to protect the rights and freedoms of individuals with disabilities. Its remit includes those with long-term mental or intellectual impairments. Consequently, many of the 159 signatories to the convention are attempting to revise their mental health legislation to bring it in line with the UN-CRPD. The World Health Organisation Resource Book on Mental Health, Human Rights and Legislation (WHO-RB) provides guidelines for drafting and revising mental health legislation. This document includes a checklist detailing topics, which should be addressed, but some elements of the WHO-RB appear to be in conflict with the UN-CRPD. This paper explores the UN-CRPD and the WHO-RB with specific focus on their positions on confidentiality, privacy and the rights of care-givers. We consider how the Indian Mental Healthcare Bill 2016 (IMHB) attempts to harmonise these two perspectives. Methods References to privacy, confidentiality and carers were identified and compared in the UN-CRPD, WHO-RB and IMHB. In addition to this, eleven items were identified in the WHO-RB Checklist relating to privacy, confidentiality and carers. The IMHB was analysed to see if it was concordant with these items. Results All three documents (UN-CRPD, WHO-RB and IMHB) refer to privacy, confidentiality and care-givers. The consideration of privacy in the WHO-RB was comprehensive; the UN-CRPD and the IMHB by contrast, affirm privacy as a right but fail to explore it in detail. The consideration of family and care-givers is starkly contrasted in the three documents. The UN-CRPD gives consideration to a person's right to have a family but makes little direct reference to the role of family in delivering care or supporting capacity. Regarding care-givers and family's quality of life, it briefly considers the material consequences of caring for an individual with disability, but fails to consider the psychological impact of such care-giving or how further exploration of confidentiality and privacy could ameliorate some of these stressors. The IMHB is adherent with five out of the eleven items (45.4%) drawn from the WHO-RB's checklist relating to privacy, confidentiality and carers. The IMHB attempted to address the others using its construct of nominated representatives and we identify some of the limitations of this concept in our discussion. Conclusion The UN-CRPD affirms the key fundamental principles of privacy and confidentiality, but its consideration of these principles lacks the depth required to address the complex and varied issues that can arise in the realm of mental health. The UN-CRPD fails to consider the role of the family and carers in sufficient detail. Confidentiality, privacy and the complex role of family are, however, discussed in the WHO-RB and this document can greatly supplement the UN-CRPD. This is especially true in instances when temporary limitation of specific rights is required. The IMHB has incorporated the UN-CRPD principles and applied them to mental health, and, in doing so has addressed many of the issues raised by the WHO-RB.