Top diplomats from world powers gathered in Paris to affirm their stance on peace talks between the Israelis and Palestinians, days before U.S. President-elect Donald Trump takes office threatening to upend the international consensus behind addressing the long-running conflict.

Some 75 governments and international organizations used Sunday’s meeting to send a message to Mr. Trump that the only viable solution to the conflict is the creation of a Palestinian state alongside Israel.

Noting that a new administration was poised to take power in Washington, French President François Hollande said that decades of talks to create a Palestinian state can’t be “improvised or overturned.”

“This solution is the only one possible for peace and security,” Mr. Hollande said during the meeting.