Iran, Turkey and Russia joined European powers in sharply criticising the US president, while Syria vowed to recover the area using "all available means".
Mr Trump took many ‐ including the Israeli government ‐ by surprise on Thursday when he tweeted his backing for Israel’s claim over the territory, marking a dramatic shift in policy over the status of an area captured in the 1967 Middle East war.
A German government spokesperson said Berlin "rejected unilateral steps" to redraw national boundaries, adding: "If national borders should be changed it must be done through peaceful means between all those involved."
Echoing those concerns, the French foreign ministry said it did not recognise the Israeli annexation of the Golan Heights and Mr Trump’s statement was "contrary to international law".