"After more than sixteen years in parliament, including four years as Prime Minister during a very challenging time for our country, it is time for me to return to private life," Morrison said in a statement.
Morrison said he would take on "strategic advisory roles" across Asia on security issues in the Indo-Pacific, adding that he was "looking forward to being more active in church and spending time with his family".
The former prime minister was heavily criticized by the Australian parliament in 2022 for the secret powers he was given during the pandemic. Morrison had announced that the decision to make him a joint minister responsible for health, finance, treasury and home affairs would benefit the country.
Morrison was the target of historical criticism for secretly appointing himself to various ministerial positions during his prime ministership.