According to Article 7.4 of the 2008 Constitution of the Kingdom of Bhutan, "A Bhutanese citizen shall have the right to freedom of thought, conscience and religion. No person shall be compelled to belong to another faith by means of coercion or inducement."

References:

2008 Constitution of the Kingdom of Bhutan: "Article 7: Fundamental Rights," Constitution of the Kingdom of Bhutan, 2008, 14: https://heinonline-org.proxygw.wrlc.org/HOL/Page collection=cow&handle=hein.cow/zzbt0002&id=22&men_tab=srchresults