Biden will instead attend meetings with Ukrainian prime minister.
President Nicolás Maduro says the U.S. "aims to generate a false image of war."
The two leaders agreed on the importance of sovereignty in Ukraine, the White House said.
He said Russia has clearly crossed a line in Ukraine.
Biden made the remarks as he visits Chile to attend the swearing in of Michelle Bachelet.
Another trip scheduled for this week, to the Dominican Republic, was cancelled.
The visit “will highlight the strong support of the United States," the White House said.
The former national security advisor warned standoff with Putin could spiral out of control.
Ryan also proposed expanding energy exports to loosen Russia’s influence over Western Europe.
The Republican called for sanctions, military support and increased natural gas exports.