But he does not recall the details of what Mr Papadopoulos said, Mr Sessions testified before the House Judiciary Committee.
Sessions came under fire last month after a former campaign advisor to U.S. President Donald Trump, George Papadopoulos pleaded guilty to misleading investigators about his involvement with Russian Federation.
Sessions brought up the chaotic nature of the Trump campaign to explain why he may not recall certain events, such as a conversation Carter Page alleged to have had with him about a trip to Russian Federation. Sessions is at the hearing to answer questions about his leadership of the Department of Justice and his interactions with Russians while a top adviser in the Trump campaign.
The comment by Sessions to a House of Representatives panel did not reveal any new link between the Trump team and Russian Federation but it was another example of the top USA law enforcement official offering a different version of events as lawmakers try to work out if the Trump campaign colluded with Russian Federation in the 2016 election.More news: Most unaware of link between alcohol, cancer
Sessions said at the hearing on Tuesday that he forgot about the March 2016 meeting because the Trump campaign was "a form of chaos" from the beginning.
Mr. Sessions declined to say whether he was recused.
But we know one fact.
Sessions later said he recalled the meeting following news reports about it.More news: Sweden qualify as Italy miss out on FIFA World Cup
Sessions said he hadn't seen the findings of the report but added: "I'm aware that there are groups that do have an extraordinary commitment to their racial identity, and some have transformed themselves even into violent activists". "After reading his account, and to the best of my recollection, I believe that I wanted to make clear to him that he was not authorized to represent the campaign with the Russian government, or any other foreign government, for that matter". She's conducted numerous lengthy interviews with the president and, according to White House sources, was on a short list to be named as deputy attorney general.
In response, Assistant Attorney General Stephen Boyd wrote that Sessions had "directed senior federal prosecutors to evaluate certain issues raised in your letters", and those prosecutors would "report directly to the Attorney General and Deputy Attorney General, as appropriate, and will make recommendations as to whether any matters not now under investigation should be opened, whether any matters now under investigation require further resources, or whether any matters merit the appointment of a Special Counsel".
"I will not accept and reject accusations that I have ever lied under oath. I have always tried to answer the questions fairly and accurately". President Trump's oldest son released the messages after The Atlantic reported them Monday.More news: United States ground invasion of North Korea could cost 'millions' of lives
Sessions has given sworn testimony at least three times to Senate and House committees, and Democratic lawmakers have pointed to inconsistencies in his statements.