Bush and Merkel said it was important for the international community to stay united in the drive to stop Iran from developing a nuclear weapon.
Their meeting came as Britain and France, backed by the United States, introduced a UN Security Council resolution demanding Iran suspend uranium enrichment that the West suspects is part of a secret nuclear weapons program.
China's UN Ambassador Wang Guangya said the current draft "will not produce good results."
Russia's new UN Ambassador, Vitaly Churkin, said he hoped for a vote before foreign ministers of the United States, Britain, France, China, Russia, and Germany meet in New York on May 8 and 9. He also reiterated his country's opposition to sanctions.