Trump told leaders at the G7 meeting in France that the US-Iran framework serves as a non-binding agreement.
He made clear the US will not pay for any reconstruction work in Iran.
He said the US will not contribute funds and expects Iran to meet the conditions first.
The plan focuses on stopping Iran from building nuclear weapons and reopening the Strait of Hormuz for shipping.
Trump noted the early effects already appear in global markets and oil prices.
He added that Iran must show real change in its actions for the process to move forward.
This comes after discussions on the framework, which both sides continue to review.
