Van der Zwaan, who received 30 days in prison for lying to US federal investigators, was transferred into the hands of the Dutch authorities, CNN reported citing the US Immigration and Customs Enforcement officials.
The attorney completed his sentence in a Pennsylvania's prison, the media noted on Tuesday. Prosecutors also ordered van der Zwaan to pay a penalty of $ 20,000.
Van der Zwaan lied to the FBI and Mueller's office when asked about his work as an attorney for a law firm that the Ukraine Ministry of Justice had asked to put together a report on former Prime Minister Yulia Tymoshenko in 2012, according to documents by the Special Prosecutor’s office.
He deleted or otherwise did not produce emails requested by the Special Counsel's office, including an email between him and "Person A" in September 2016.
Mueller's investigation into allegations that the Trump campaign colluded with Russia during the 2016 presidential race has extended for more than a year. However, the investigation has not produced evidence of collusion.
Russia has repeatedly denied interfering in the US political process and colluding with the Trump campaign. President Donald Trump has also denied collusion and characterized Mueller’s probe as a witch hunt.