Protesters waving Palestinian flags gathered on a road leading to the embassy northeast of Beirut amid tight security by Lebanese troops and riot police.
“Death to America! Death to Israel! We will die and Palestine survive," some of the demonstrators chanted, AP reported.
On Tuesday night, US President Donald Trump unveiled his long-delayed Middle East plan, a proposal Palestinian leaders called a “conspiracy” that “will not pass”.
Following Trump’s announcement, Palestinian President Mahmoud Abbas said “a thousand no’s” to the plan.
The American plan sparked widespread international condemnation.
The deal of century ploy, fronted by US President Donald Trump's son-in-law Jared Kushner, had already been rejected by the Palestinians, who say the White House’s policies have been blatantly biased in favor of Israel.
Palestinians have cut off all contacts with the Trump administration since the US president broke with decades of bipartisan policy to recognize Jerusalem al-Quds as the capital of Israel in December 2017.