Turkey's President has warned the Netherlands will "pay the price" after two of his ministers were barred from addressing Turkish expats in the country.
In response Turkish President Recep Tayyip Erdogan decried the Dutch as "Nazi remnants", while Prime Minister Binali Yildirim has threatened "harsh" retaliation.
Protests against the cancellation of the rally in the Netherlands have been taken place in Rotterdam and Istanbul.
Dutch Prime Minister Mark Rutte has said two Turkish ministers were prevented from travelling in the Netherlands and campaigning among Turkish voters because Ankara had threatened sanctions against his government.
"We can never do business under this kind of blackmail," he said, adding: "We drew a red line."
Mr Rutte also said he was shocked to see Turkey's family affairs minister attempt to get to a Rotterdam rally by car after the Dutch government had made clear she was not welcome.
Fatma Betual Sayan was escorted back to the German border after a long standoff outside the Turkish consulate in Rotterdam.
Earlier, the Dutch government had withdrawn the landing rights of the plane carrying Turkey's foreign minister, who was also scheduled to attend a rally.
The ministers planned to urge Turkish expatriates to back a referendum, which would expand Turkey's president's powers, which will be held in April.
German Chancellor Angela Merkel has backed the Netherlands in its diplomatic fight with Ankara while the EU has urged Turkey to calm down.
A diplomatic row between Turkey and the Netherlands has broken out but what is it all about?
Turkey's president described the Dutch as "Nazi remnants" and "fascists" after his Foreign Minister's plane was denied landing permission.