The trilateral meeting is aimed at enhancing links and cooperation between the three countries, and discussing topics in the European and a broader international context.

The sixth meeting of the heads of state of Austria, Croatia and Slovenia will focus on the future of the EU, in particular in light of the May elections to the European Parliament.

Pahor, Van der Bellen and Grabar-Kitarović are also expected to discuss ways to boost amicable relations with the neighbouring countries, and the situation in South-east Europe.

As part of the latter topic, they will talk about the Western Balkans' prospects for joining the EU and illegal migration, the president's office said in a press release.