Angry Macedonian protestors try to storm an EU building in the capital Skopje
Albania, Bosnia and Herzegovina, Kosovo, Macedonia, Montenegro and Serbia have all been called to the talks amid growing fears of rising tensions in the troubled region.
European Commission spokeswoman Maja Kocijančič said: "During the informal dinner next Wednesday, Western Balkan leaders will discuss the situation in the world in light of the latest events in the region, and there will also be discussion about further steps.”
Ms Kocijančič added that the meeting will serve to continue the conversations Ms Mogherini had when she visited the region in early March.
European Union foreign policy chief Federica Mogherini
Western Balkan leaders will discuss the situation in the world in light of the latest events in the region
Serious problems were highlighted last month in a report from the NATO Parliamentary Assembly which said the region needed strong external support in its Euro-Atlantic integration.
The report described a crisis-torn corner of Europe struggling with "high unemployment rates, widespread corruption and erosion of the state of democracy and the rule of law – often with Russian meddling into state affairs".
It said: “The Western Balkans remains an area of special concern for NATO, which is currently present in the region as the Kosovo Force (KFOR) and Operation Althea, with a notion that only Serbia and Republika Srpska have not shown interest in becoming a part of the NATO.
Serbia tried to provoke Kosovo by driving a train wit nationalist slogans to the border
“Although NATO acknowledges that the EU has been a key player in maintaining the region’s stability, it also considers economic crisis which seems to have opened the door for anti-EU populist and nationalist movements to challenge difficult reforms.”
Tensions between Kosovo and Serbia have been running high for more than a year but reached boiling point in January when Belgrade sent a train painted with the slogan “Kosovo is Serbia” to the border.
Relations deteriorated further when Prishtina announced it wanted to form a regular army.
There are also internal problems in Montenegro, a soon-to-be NATO member state where the opposition has boycotted parliament.
Members of the Kosovo Security Force on parade
Dramatic images as protestors storm the streets of Skopje
Wed, March 22, 2017
Tens of thousands of demonstrators gathered in Macedonia's capital, Skopje, Tuesday to protest a visit by a European Union envoy who is trying to break the political deadlock that has left the country without a government for three months
1 of 10
A protestor makes their EU views known
And the situation in Macedonia is “even more discouraging” with the President refusing to give a mandate to opposition leader Zoran Zaev to form a government.
The NATO PA report said: “Overall, political tensions between the countries of the Western Balkans are not calming down, even with the urge of the EU.”
“There is a very high risk for the Western Balkans to slide back to nationalist ideology and authoritarianism is not a formula for success where the problem has been the absence rather than a surfeit of democracy.”