The Three Seas Initiative (3SI) is an economic cooperation platform launched by the presidents of the region’s countries and inaugurated at the first 3SI Summit in Croatia on 25 August 2016. The 3SI brings together thirteen EU Member States located between the Adriatic, Baltic and Black Seas – Austria, Bulgaria, Croatia, the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia and Slovenia.
The Initiative has an important role to play in strengthening cooperation between countries in the Central and Eastern Europe. The Initiative is designed to develop major physical infrastructure projects and reduce connectivity gaps in the energy, transport and digital networks on the EU’s north-south axis.
The 3SI has the potential to strengthen regional security, promote economic growth and competitiveness, as well as EU-level cohesion and transatlantic cooperation links. The continued participation of 3SI partners – the US, Germany and the European Commission – in the 3SI is considered to be of strategic importance. The Initiative is an instrument complementary to the EU strategies and policies. This is evidenced by the close involvement of the European Commission in the Initiative and its participation in the 3SI summits.
Seven 3SI summits have been held so far: in Croatia, Poland, Romania, Slovenia, Estonia, Bulgaria, Latvia and Romania. The 3SI Summit and Business Forum on 11 April, 2023 will be hosted by Lithuania.