"There will indeed be a special summit in November, and the states and heads of government will support that," he told reporters in the Austrian city.
Brussels originally said it wanted an agreement on Britain's withdrawal from the European Union by a formal EU summit in October.
But after months of deadlock in the talks, EU President Donald Tusk had proposed an extraordinary summit in mid-November to clinch the deal.
British Prime Minister Theresa May attended the talks in Salzburg but will leave the other 27 EU leaders on Thursday at lunchtime while they plan their approach to the final stage of negotiations.
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