Darinko Kosor said his party would attend the talks with the top state officials.
"We can discuss only one topic: setting a date for parliamentary elections, because that is what citizens are demanding," he said, adding that the HSLS would propose that elections were held before the referendum on EU entry.
The HSLS won two seats in the last parliamentary elections. In the meantime, those two members of Parliament have left the party and become independent deputies.