The French Minister of Economy and Finance Bruno Le Maire | Eddy Lemaistre/EPA Le Maire: EU ‘falling apart before our eyes’ Franco-German relationship faces ‘moment of truth’ on 4 key questions, French economy minister says.

French Economy Minister Bruno Le Maire said Tuesday that Europe is in "a state of decomposition," with countries trying to find "national solutions to problems that can only have European solutions."

Speaking ahead of a joint meeting of French President Emmanuel Macron, German Chancellor Angela Merkel and their governments, Le Maire also said Franco-German relations have reached a "moment of truth."

In an interview with France's BFMTV, Le Maire painted a dramatic picture of the challenges facing the European Union.

"Europe is in a state of decomposition, it's falling apart before our eyes," he said.

"Immigration, financial risks ... these are problems that can only have European solutions," he said. But, Le Maire added, member countries are "closing in on themselves," trying to find national solutions.

He said Macron and Merkel would discuss four "non-negotiable" key issues — a eurozone investment budget, a safety net for banks, a taxation plan for digital giants and convergence on corporate tax.

An agreement on these four key questions would represent a "significant step forward towards [the EU's] financial security," Le Maire said, but a failure to agree could plunge the EU into a "period of turbulence."

"We are at the moment of truth concerning the Franco-German relationship and the future of the eurozone. The choices we take today on these questions are going to determine the EU's future," he said.