"In January 2017, I made a bad mistake for which I paid dearly, I am ashamed", Papadopoulos had told the court in Washington.
Moss said Papadopoulos will remain free until the federal Bureau of Prisons decides when and where he should surrender.
"I can only speak for myself, and I'm paying the price for my mistakes", he said, adding that he was not expecting a pardon and would not seek one.
He "elevated his self-interest over the national interest", he said. "He was seeking to assist himself in a way that placed his own personal ambitions above the interests of the United States". Papadopoulos, was also ordered to pay a fine of $9,500, is the second person sentenced in Mueller's investigation.
The Democratic National Committee (DNC) said in a court filing Friday that the London-based Maltese professor who told former Trump campaign adviser George Papadopoulos that Russian Federation had "dirt" on Hillary Clinton may be dead.
But he said then-senator and now-Attorney General Jeff Sessions "was actually enthusiastic". Papadopoulos says he had nothing to do with the leak.
Papadopoulos' mother Kiki, aunt Maria and father Tony spoke to CNN as they exited the hearing. "I think is a very unusual case", Breen said.
Breen told reporters outside court, "I think we're all somewhat satisfied at this point in time that they know Russian Federation meddled in the election. I'm sure you're wondering what comes next", and that he was impressed by his words to the judge. Mifsud left the United States and not returned, after the Federal Bureau of Investigation found him in the US on February 11, 2017, about two weeks after Papadopoulos' first interview.
The FBI cancelled the meeting when it discovered that Papadopoulos had sat down for a media interview about the case.
But even without his active help, the court record suggests that Mueller's team learned a lot from his emails and texts, as well as from seizing his phone.
Papadopoulos has cooperated for more than a year with Special Counsel Robert Mueller's probe into Russian interference in the United States presidential election and possible collusion with the Trump campaign.
Both Papadopoulos' mother and his now-wife, Simona Mangiante, whom he met through LinkedIn during the 2016 campaign, have been his outspoken defenders since his plea. "An investigator involved in our efforts to serve him was told Mifsud might be deceased", DNC spokeswoman Adrienne Watson said.
The FBI launched Crossfire Hurricane, its counterintelligence investigation into the Trump campaign in July 2016 after learning that Papadopoulos had repeated Mifsud's claim to Australian diplomat Alexander Downer in London over drinks.
Mifsud was reportedly teaching at a private university in Rome before he vanished late past year, shortly after his name emerged as a key figure in the investigation into Russian interference in the 2016 election.
She was responding to a question from ABC News Chief Anchor George Stephanopoulos about her interactions with the special counsel's team, asking, "You were questioned, as well, by Robert Mueller's team and from the start, they suspected you were a Russian agent".