Matteo Renzi, Italy's prime minister, pauses at a news conference following the constitutional reform referendum results in Rome, Italy, on Monday, Dec. 5, 2016.

Italian President Sergio Mattarella asked Prime Minister Matteo Renzi on Monday to delay his resignation until Parliament passes the budget, which is expected to be approved within days.

Renzi said on Sunday he would resign after suffering a humiliating defeat in a referendum over his plan to reform the constitution, throwing the country and the euro zone into confusion. He said voters had shown a "clear" rejection of legislative reform measures and that he would meet with his cabinet on Monday and then hand in his resignation to the President Mattarella, taking full responsibility for the defeat.