He received seventh position on a combined electoral list of the Democratic Party of Serbia and Dveri as a non-party candidate in the 2016 Serbian parliamentary election and was elected when the list won thirteen members. The election was won by the Serbian Progressive Party and its allies, and Ševarlić sits with the Dveri parliamentary group as an opposition member. He is a member of the assembly's agriculture, forestry, and water management committee; a deputy member of the committee on the diaspora and Serbs in the region and the committee on the economy, regional development, trade, tourism, and energy; and a member of the parliamentary friendship groups with Belarus, Kazakhstan, Macedonia, Russia, and Slovenia. In 2017, he attracted media attention for reciting an anti-GMO song by the poet Ljubivoje Ršumović in the National Assembly. He left the Dveri parliamentary group in February 2019, after disagreeing with the party's boycott of the assembly. He received sixth position on a combined electoral list of the Healthy Serbia, and Better Serbia as a non-party candidate in the 2020 Serbian parliamentary election.