It said the district court in California, which had issued the ban in June, had "abused its discretion in entering an injunction".
Earlier this month, a sales ban on Samsung's Galaxy Tab 10.1 tablet computer in the US was also lifted.
The two firms are involved in a legal tussle over patent infringement claims.
Samsung welcomed the latest decision saying it "confirms that the role of patent law is to protect innovation and not to unreasonably stifle competition and restrict consumer choice".
"We will continue to take all appropriate measures to ensure the availability of our innovative products," the South Korean manufacturer said.