Sharon said Israel needs to do everything possible to prevent such a situation, which he said would threaten stability in the Mideast.
Sharon said he's sure all diplomatic efforts to solve the problem would be exhaused before any other action against Iran would be made.
Sharon's comments come after a senior U.S. diplomat urged the international community to put diplomatic pressure on Iran in reaction to what he described as Tehran's increasingly "radical" behavior.
Undersecretary of State Nicholas Burns said Iranian President Mahmud Ahmadinejad is pursuing a confrontational foreign policy and what he called an irresponsible nuclear weapons program.
(with news agencies)