One service member was killed in an insurgent attack in eastern Afghanistan. Another died as a result of a non-battle related injury in the country's south.
NATO did not release any other information about the deaths pending notification of family members.
So far this year, 371 international troops have died in Afghanistan.
Fighting is winding down with the advent of cooler weather but the Taliban still continue to target coalition and Afghan forces, especially with roadside bombs.
Land mines and a suicide bomber killed 20 people in a spate of attacks across Afghanistan on Thursday.