لجنة الأمم المتحدة لحقوق الإنسان
President Carter appointed Lowenstein as United States Representative to the United Nations Commission on Human Rights, and thus head of the United States delegation to the thirty-third regular annual session of the United Nations Commission on Human Rights in Geneva, Switzerland, in 1977. Lowenstein served with the rank of ambassador from August 1977 to June 1978 in the capacity of alternate United States Representative for Special Political Affairs to the United Nations.