Mr. Rabin was killed in 1995 by a Jewish extremist opposed to the peace efforts.
But privately, officials from both sides said they remain hopeful about the peace efforts.
He is asking Russia to hold a conference in June to advance the peace efforts.
The mid-90's were heady days for believers in the peace efforts.
"There is a limit to how long we can wait," said another Western diplomat familiar with the peace efforts.
In December 2008 Yusuf, who faced growing criticism for his handling of the peace efforts, resigned as president.
"Things have passed from hope to disillusion," said a Latin American ambassador involved in the peace efforts.
Other critics saw Rabbi Yosef's remarks about Palestinians as an attempt to complicate the peace efforts further.
The killing of Osama bin Laden in Pakistan last May added momentum to the peace efforts, underscoring the increasingly limited ties between Al Qaeda and the remaining Taliban.
A catastrophe bound to happen ReprintsThe UN has so far held back from doing much, saying it is leaving matters to the peace efforts of regional organisations.
"As you know, the peace efforts by our government and the international community are going on, but some of our neighboring countries failed in this regard," he said.
