She retired from politics at the 2016 federal election. In September 2017 Parke was appointed as an Ambassador for ICAN (International Campaign to Abolish Nuclear Weapons). In October 2017 ICAN was announced as the winner of the 2017 Nobel Peace Prize for its role in achieving the Treaty on the Prohibition of Nuclear Weapons. In December 2017, and again in 2018 and 2019, Parke was appointed by the UN Human Rights Commissioner to the "Group of Eminent Experts on Yemen", to investigate human rights violations in Yemen.