"The pursuit of expanding the format may end up with no new entrants, and the loss of confidence from Germany, France and the EU," he said in a statement.
Poroshenko acknowledged that the United States, Great Britain, Canada and Poland are friendly states for Ukraine, however, such rash and uncoordinated initiatives of Ukrainian President Volodymyr Zelenskyy can completely destroy the only format of negotiations on Donbass.
"And the other - Budapest, Bucharest, Geneva - as promised these two years, will not get", - added the Ukrainian ex-president.
Earlier, Zelensky said about the need to reform or abolish the Minsk format, and also called for the expansion of the Normandy group.
According to him, it is necessary to create a parallel format with "very serious, powerful players."