Jelinčič told the press that he and the head of the Marjan Šarec List (LMŠ) had talked about the constitution of the National Assembly, creation of the new government and saving Slovenia, which "is in dire straits".
Asked whether he would endorse a candidate for the parliamentary speaker who would be proposed by an informal centre-left coalition, he said that there was no such coalition yet.
Speaking about potential participation in such a coalition, Jelinčič said that the "question is whether this is a centre-left coalition at all. I think that it is a coalition for its own sake to a large extent."
He is afraid that a majority of the parties which see themselves in such a coalition think only of their own benefit. Most of them are parties who have ruled in Slovenia and want that their staff remain in their posts, he added.
Šarec said that the National Assembly had to be constituted first at the maiden session on Friday, and added that there was no rush to appoint the parliamentary speaker.
"If there is will, we will appoint the parliamentary speaker at the first session already, and if there is no will, then we will not force it," he said.
Šarec denied reports that he and the outgoing PM Miro Cerar of the Modern Centre Party (SMC) had frictions and said that he was in constant touch with him.
"Everything that we have done so far is talk. This is not coalition building and negotiations about ministerial posts," he added.
Jelinčič meanwhile confirmed that he was interested in taking up the post of culture minister, as "there are many things to be done and solved there".