detainment of a "great patriot hostage".
The Turkish lira was slightly lower on Friday after the U.S. warned Ankara should expect more sanctions over the detention of an American evangelical pastor.
It hit an all-time low of 7.2 lira to the dollar earlier in the week.
US Treasury Secretary Steven Mnuchin said on Thursday that the United States was ready to place further economic sanctions on Turkey if detained American pastor Andrew Brunson is not released.
Mr Trump said: "They should have given him back a long time ago, and Turkey has in my opinion acted very, very badly".
The crisis has prompted widespread selling in other emerging markets, sparking fears of a global crisis.
The US insists the pastor, a long-time Turkish resident, is "a victim of unfair and unjust detention".
The crash comes amid the ongoing diplomatic row between the U.S. and Turkey over an American pastor alleged to have been involved in the Middle Eastern country's 2016 attempted coup.
Brunson's lawyer Ismail Cem Halavurt told CBS News on Friday that they may file another appeal with the court as, "depending on the developments, we can apply again".
Turkey retaliated with tariffs on some USA imports and said it would boycott U.S. electronic goods.
We recently told you that Pastor Andrew had been released from a Turkish prison and was allowed to return to his house in Turkey where he now remains under house arrest.
The Qatari emir said that beyond financial calculations, his country's primary motivation was to "stand by our brothers in Turkey", a hint at the nascent but apparently strong strategic alliance between the two Muslim countries.
"Turkey has taken advantage of the United States for many years".
Last Friday, U.S. President Donald Trump upped the ante by doubling U.S. tariffs on Turkish aluminum and steel imports.
Inflation in the state is at a 14-year high in Turkey, at close to 16%, but the country's central bank - which is under the control of Erdogan - refuses to raise interest rates, a simple mechanism for bringing down rampant inflation.
This week, Antalya airport in southern Turkey has welcomed more flights from the United Kingdom than the popular Spanish islands of Mallorca and Tenerife.
Turkish officials visited Washington last week with the idea of seeking leniency for a usa investigation into a Turkish bank, which a source told the Eye fell through, but opened a dialogue.