The meeting, scheduled for April 13 in Barcelona, will be attended by representatives from 28 members of the European Union as well as Tunisia, Egypt, Israel and the Palestinian Authority.
"Syria and Libya have not been invited to participate in the meeting because of the internal situation [in the countries]," the source said.
Libya has been in turmoil after the fall of the long-time ruler Muammar Gaddafi in 2011. Two rival governments and many militant groups are currently fighting for control over the country's strategic areas.
The main issues on the agenda of the meeting are terrorism, security, migration, trade and energy industry.
The European Neighborhood Policy is devoted to helping countries, which seek an EU membership or closer relations with the bloc.