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Sweden
Practice Relating to Rule 65. Perfidy
Section C. Simulation of being disabled by injuries or sickness
Under Sweden’s IHL Manual (1991), “the feigning of incapacitation by wounds or sickness” constitutes perfidious conduct. However, “if for example a soldier simulates injury or sickness only to avoid an adversary’s attack, this is not judged as perfidy”. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b), p. 29.