The three parties are the New Slovenia Party led by Andrej Bajuk, the Slovene People's Party of Janez Podobnik and the retirees' party DESUS, led by Anton Rous.
Jansa told a news conference later in the day that he expected the parliament to consider his candidates for ministerial posts next week.
Dimitrij Rupel is likely to become Foreign Minister again, Bajuk is the candidate for Finance Minister, while Podobnik, who has recently come in the focus of media attention due to his involvement in incidents on the border with Croatia, is likely to become Environmental Protection Minister.
Other nominees for ministerial posts are less known to the public.