"We realize that we will not sign a peace agreement following the conference. To achieve peace, it is necessary for both sides to come to the negotiating table. This is not possible at the moment," Amherd told German newspaper Frankfurter Allgemeine Zeitung.
The president expressed the hope that Russia and its allied countries would agree to join a new conference.
"For a conference to be successful, it would be very important that countries close to Russia attend it. But judging by the current state of affairs, China, Brazil and South Africa will not take part in it," Amherd said.
The upcoming conference will focus on humanitarian assistance, nuclear and food security rather than peace issues, the Swiss president added.