The Organization of American States called an emergency meeting for Tuesday to consider suspending Honduras under an agreement meant to prevent the sort of coups that for generations made Latin America a tragic spawning ground of military dictatorships.
Zelaya was to address the U.N. General Assembly on Tuesday to seek support from its 192 member nations.
The new government, however, was defiant. Roberto Micheletti, named by Congress to serve out the final seven months of Zelaya's term, vowed to ignore foreign pressure.
"We respect everybody and we ask only that they respect us and leave us in peace because the country is headed toward free and transparent general elections in November," Micheletti told HRN radio.
He insisted Zelaya's ouster was legal and accused the former president himself of violating the constitution by sponsoring a referendum that was outlawed by the Supreme Court. Many saw the foiled vote as a step toward eliminating barriers to his re-election, as other Latin American leaders have done in recent years.
Despite the protests at the palace, daily life appeared normal in most of the capital, with nearly all businesses open. Some expressed relief at the departure of Zelaya, who alienated the courts, Congress, the military and even his own party in his tumultuous three years in power.
The United States supported a number of military coups in Central America during the Cold War and used Honduras as a base for its counter-insurgency operations in the region in the 1980s.
Washington still has several hundred troops stationed at Soto Cano Air Base, a Honduran military installation that is also the headquarters for a regional U.S. joint task force that conducts humanitarian, drug and disaster relief operations.
The ousted president, who was in office since 2006, had wanted to hold a referendum that could have led to an extension of his non-renewable four-year term in office.
Expulsion condemned
Polls for the vote were due to open early on Sunday, but instead troops stormed the presidential palace at dawn, detained Mr Zelaya and flew him to Costa Rica.
The military, Congress and the Supreme Court in the Central American nation had all opposed Mr Zelaya's referendum.