Turkey says it is halting all high-level political discussions with the Netherlands and that Ankara’s agreement with the European Union to help hold back a flood of Asian migrants has ended, as far as Turkey is concerned.

Deputy Turkish Prime Minister Numan Kurtulmus announced the freeze in Ankara Monday amid an escalating row over Turkish officials' access to the Netherlands.

Over the weekend, the Netherlands refused to allow Turkish Foreign Minister Mevlut Cavusoglu to visit Rotterdam for a political rally.

“Why this time am I a terrorist?  Are the Turks living in this country terrorists?” Cavusoglu asked in an interview Monday with CNN's “Connect the World.”

Soon after Cavusoglu was refused entry, the Dutch stopped Turkey's Family Affairs Minister Fatma Betul Sayan Kaya from entering the Turkish consulate in Rotterdam.  She was later escorted out of the country.

Violent clashes erupted after the two ministers were prevented from addressing rallies in Rotterdam.

According to media reports, Turkish Deputy Prime Minister Nurettin Canikli said on March 13 that steps would be taken to reevaluate Ankara’s agreement with Brussels to prevent refugees and migrants from crossing into the EU after they transit Turkey.

Turkish President Recep Tayyip Erdogan twice during the weekend accused the Netherlands of behaving like Nazis.

Ankara has been angered by the refusal of some EU countries to let Turkish ministers speak at political rallies abroad.  They are seeking a ‘yes’ vote from millions of Turkish expatriates in an April 16 referendum on whether to broadly expand Erdogan’s presidential powers.

EU foreign policy chief Federica Mogherini and EU Enlargement Commissioner Johannes Hahn on March 13 called on Ankara to “refrain from excessive statements and actions that risk further exacerbating the situation.”

But Erdogan in an interview with A-Haber television on March 13 accused German Chancellor Angela Merkel of failing to respond to 4,500 dossiers sent by Ankara on what Turkey says are terrorist suspects – including suspects linked by Turkish authorities to Kurdish militants and a failed coup attempt in Turkey in July 2016.

In further criticism of Dutch Prime Minister Mark Rutte, Erdogan told A-Haber TV that Dutch leaders “haven’t understood democracy.”

Turkey's foreign ministry on March 13 formally protested the treatment of a Turkish minister who was escorted out of the Netherlands after trying to attend a weekend referendum rally.

Ankara also objected to what it called a "disproportionate" use of force by Dutch authorities against Turkish demonstrators at a protest afterwards.

Late on March 13, the government in Ankara announced that it will not allow the Dutch ambassador to return to Turkey from his current leave abroad.

Deputy Prime Minister Canikli also said the government will advise Turkey’s parliament to withdrawn from the so-called Dutch-Turkish friendship group.

Some 400,000 Turkish citizens live in the Netherlands and an estimated 1.5 million Turkish voters live in Germany.

Reuters reports that Dutch direct investment in Turkey amounts to $22 billion, making the Netherlands the biggest source of foreign investment with a share of 16 percent.

Turkish exports to the Netherlands totaled $3.6 billion in 2016, making it the tenth largest market for Turkish goods, according to the Turkish Statistical Institute. Turkey imported $3 billion worth of Dutch goods in 2016.

Dutch visitors are important to Turkey's tourism industry, which was hit hard in 2016 by security fears due to attacks by Islamic State and Kurdish militants. Some 900,000 Dutch people visited Turkey last year, down from 1.2 million a year earlier.

Ankara is seeking an official written apology for the treatment of its family minister and diplomats in Rotterdam, the Turkish foreign ministry sources also said, according to Reuters.

Dutch Prime Minister Mark Rutte has said it is Erdogan who should apologize for comparing the Netherlands to fascists and Nazis, adding that Turkey was acting “in a totally unacceptable, irresponsible manner.”

NATO Secretary-General Jens Stoltenberg called on Turkey and the Netherlands to defuse the row.