Foreign Minister Bob Carr said an early withdrawal of Australian troops from Afghanistan would damage Australia's reputation.
And he said bringing forward the scheduled 2014 pull-out date would benefit neither country.
"Australia making a dash for it - that would do our reputation enormous harm," Senator Carr told Sky News today.
The deaths of five diggers in 24 hours in Afghanistan last week prompted fresh criticism at home of Australia's continued military involvement in the war-torn country.
Three were killed by a rogue Afghan soldier, taking to seven the number of Australians who have died in so-called "green on blue" attacks.