Article 3 of the European Convention on Human Rights prohibits harming a person’s physical or mental integrity, whether by torture or inhuman or degrading treatment or punishment.
This is one of the few prohibitions in the Convention that is absolute, in the sense that there are no exceptions.
Article 3 – Prohibition of torture
“No one shall be subjected to torture or to inhuman or degrading treatment or punishment.”
Article 3 of the European Convention on Human Rights