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.
Amid escalating tensions between the Netherlands and Turkey, a man has climbed onto the roof of the Dutch consulate in Istanbul and replaced the Netherlands' flag with a Turkish one.
It comes after two Turkish ministers were prevented from attending rallies in Rotterdam to campaign ahead of referendum on extended powers for Turkey's president which will take place in April.
In retaliation, president Recep Tayyip Erdogan branded the Dutch "fascists" and protests have taken place in both Turkey and the Netherlands.
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.