Expanding the European Union's customs union to include Turkey also won't move forward as long as tensions remain, she said.
After the 1980 coup d'etat, Akhanli went into hiding and was a political prisoner in a Turkish military jail between 1985 and 1987. Who are you to talk to the president of Turkey?
On Friday, Erdogan had called on ethnic Turks not to support major parties including "the Christian Democrats, the SPD [Social Democratic Party] or the Greens", calling them "enemies of Turkey".
Doğan Akhanlı, a Turkish-born German author was detained by Spanish police at Turkey's request on Saturday.
He had earlier said that a similar quake earlier in the year was artificially triggered in order to manipulate Turkey's economy.
Foreign Minister of Germany Sigmar Gabriel called the call Erdogan "a gross interference in the electoral campaign".
In the run-up to the referendum, German authorities prevented Turkish politicians from speaking to rallies of Turkish citizens in Germany, infuriating Ankara.
Gabriel said his government has been concerned for years over issues like "restrictions on the freedom of the press, treatment of the Kurdish minority" in Turkey.
Berlin has lambasted Ankara over the magnitude of the crackdown that followed last year's failed coup, which has seen several German citizens arrested, including journalists.
The German section of the writers' associated PEN said charges against Akhanli centre on a crime committed while he wasn't in Turkey. "No one who treats Germans in this way can seriously expect us to carry on with our political and economic relations as if everything in the garden were rosy". Gulen has denied the accusations.
There are an estimated 3 million people of Turkish origin living in Germany. "Forgive me but you have your legal system and so do we."Relations take a nosediveThere are three Germans citizens now imprisoned in Turkey, including Deniz Yucel, a journalist from Berlin-based Die Welt newspaper".