The U.S. expects about 800 guests on Monday, including 11 U.S. Republican lawmakers, but the Trump administration didn't invite officials from other countries because Washington says it sees the opening as a bilateral event.
During his meeting with Nickolay Mladenov, the United Nations coordinator for the Middle East peace process, Lavrov said "this impasse is getting deeper and deeper, especially in light of recent USA decisions on Jerusalem".
However, it has become clear since Trump announced the embassy move that the United States is standing firmly behind a new reality-that Jerusalem is in fact Israel's capital-a declaration that has reversed longstanding us policy on the matter, particularly that of the Obama administration, which routinely declined to state that Jerusalem is part of Israel proper.
Security is tight in Jerusalem as USA guests arrive as the region braces for protests against the opening of the United States embassy in Jerusalem.
U.S. President Donald Trump's decision previous year to recognize disputed Jerusalem as Israel's capital and move the U.S. Embassy there further fueled Palestinian anger. It expanded the municipal boundaries into the West Bank, increasing the size of east Jerusalem and annexing it to its capital, a move not recognized by most of the global community.
"It's been the capital of our state for the past 70 years".
Israeli Prime Minister Benjamin Netanyahu, taking a harder line than two predecessors, has said he won't give up any part of Jerusalem, home to 883,000 people, 38 per cent of them Palestinians. But just a month later Trump told Netanyahu he had taken Jerusalem "off the table" and that "we don't have to talk about it anymore".
Israel occupied the West Bank and east Jerusalem in 1967.
Egypt opens the crossing from time to time, mainly to allow people in special categories, including medical patients and Gaza residents studying overseas, to leave the territory or return to it.
On Sunday, scuffles broke out between Israelis visiting the Al-Aqsa Mosque compound in east Jerusalem's Old City, known to Jews as the Temple Mount, and Palestinian security officers.
He said Shifa has been badly affected by a decade-long Israeli-Egyptian blockade imposed after the Islamic militant group Hamas assumed control of Gaza. The Israeli military said the crowd had grown violent and that troops were defending the border.
On Saturday Conricus said the rules of engagement had not been changed. The move has sparked strong worldwide condemnation and comes as tensions grow between Israel and Iran.
Since the protests began on March 30, Israeli forces have killed at least 49 Palestinians in the coastal enclave, and wounded more than 8,500.
A high-ranking delegation of Gaza's Hamas rulers headed to Egypt on Sunday, amid diplomatic efforts aimed at containing the mass rally.
In an interview that aired Sunday on ABC's "This Week", White House national security adviser John Bolton said the embassy location would help the peace process. The global consensus remains that the status of the Jerusalem should be part of final status negotiations between Israel and the Palestinians.