"Croatia remains committed to the policy of regional cooperation, solidarity and full support to all countries in the region in their progress towards EU membership," the statement said.
The annual South-East European Cooperation Process (SEECP) summit will take place in Ohrid on June 1-2, bringing together leaders from Balkan and South-East European countries. Macedonia, which recognised Kosovo's independence in 2008, said it could not invite a country which did not belong to that regional forum "without the consent of all member countries."
The Croatian foreign ministry said it had still not decided whether Minister Vesna Pusic would attend an SEECP ministerial meeting ahead of the summit on Friday.
Croatia recognised Kosovo in 2008. To date, 99 countries have done so, excluding five of the 12 SEECP countries - Serbia, Greece, Romania, Moldova, and Bosnia and Herzegovina.
Kosovo has condemned Macedonia's decision not to invite it to the summit because of opposition from Serbia, which clashes with the progress Belgrade and Pristina recently made in normalising relations under the EU's aegis.
Kosovo's participation in the summit was stopped by Serbia and Bosnia. This is contrary to the principles of good neighbourliness, a prerequisite of EU integration, Kosovo Presidency spokesman Arber Vlahhiu said.
Dissatisfied with Macedonia's decision, Albanian President Bujar Nishani also refused to attend.