Former UN head Kofi Annan and the former US president Jimmy Carter have cancelled a planned trip to Zimbabwe, reported BBC.
They said the government had not granted them visas, making their two-day visit, with Nelson Mandela's wife Graca Machel, impossible.
The three international figures are part of a group called the Elders, set up to tackle world conflicts.
Earlier Zimbabwe's government denied a report that it was blocking the visit.