Nepal

Article 238, Commission for the Investigation of Abuse of Authority states:

(3) the office of the Chief Commissioner or a Commissioner shall be vacant in any of the following circumstances:
(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness.

Article 240, Auditor General states:

(3) the office of the Auditor General shall be vacant in any of the following circumstances:
(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness. 

Article 242, Public Service Commission states:

(4) the office of the Chairperson or a Member of the Public Service Commission shall be vacant in any of the following circumstances:(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness. 

Article 242, Election Commission states:

(3) the office of the Chief Election Commissioner or Election Commissioner shall be vacant in any of the following circumstances:
(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness.

Article 248, National Human Rights Commission states:

(3) the office of the Chairperson or member of the National Human Rights Commission shall be vacant in any of the following circumstances:
(c) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness. 

Article 250, National Natural Resources and Fiscal Commission states:

(3), the office of the Chairperson or member of the National Natural Resources and Fiscal Commission shall be vacant in any of the following circumstances:
(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness. 

Article 252, National Women Commission states:

(3) the office of the Chairperson or member of the National Women Commission shall be vacant in any of
the following circumstances:
(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness. 

Article 255, National Dalit Commission states:

(3) the office of the Chairperson or member of the National Dalit Commission shall be vacant in any of the following circumstances:
(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness. 

Article 258, National Inclusion Commission states:

(3) the office of the Chairperson or member of the National Inclusion Commission shall be vacant in any of the following circumstances:
(d) if he or she is removed from office by the President on recommendation of the Constitutional Council on grounds of his or her inability to hold office and discharge the functions due to physical or mental illness. 

Excerpt from the Constitution of Nepal (2017)  

Article 13, Disqualification of a Candidate states:

(1) Notwithstanding anything contained anywhere in this Act, the following persons shall be deemed disqualified to become a candidate in the election:

(i) A person who is mentally unstable

Excerpt taken from Nepal's Local Level Election Act (2017)