Sessions will be testifying regarding his role in the investigation of the Trump campaign's alleged ties to the Russian government.
Media reports last week said Mr Sessions had offered to resign because of tensions with the president.
The hearing will be held Tuesday at 2.30pm (local time).
America's top justice official will be the most senior government official to testify before the Senate committee, which is looking into allegations that Russian Federation had tried to meddle in last November's election.
The White House has rejected any collusion with Russian Federation, which has denied meddling in the U.S. election.
In a letter Saturday to Sen.
The Justice Department says Sessions looks forward to answering the committee's questions.More news: Apple updated iMac and MacBook series with latest platforms; introduces iMac Pro
It had been unclear whether the attorney general would speak in closed or open session.
President Donald Trump called James Comey "cowardly" and said he thought any leaked information coming from the former Federal Bureau of Investigation director could be "far more prevalent" than believed in his latest early morning Twitter jab, NBC News reported.
"There's a real question of the propriety of the attorney general participating in that in any way, shape or form", Democratic Senator Jack Reed told the Fox News Sunday show. "More than 20 million people watched Comey's testimony last week, and they should not be blocked from participating in democracy this week". It was the latest fallout from riveting testimony from Comey last week of undue pressure from Trump, which drew an angry response from the president on Friday that Comey was lying.
On Comey's accusations that Trump pressed him to drop the FBI investigation of Flynn, Bharara said "no one knows right now whether there is a provable case of obstruction" of justice.
An attorney and broadcaster with longtime ties to a Christian legal organization has joined President Donald Trump's outside legal team to deal with the Russian Federation probes. Comey testified in public and then met with the committee in a closed session to discuss matters touching on classified information.
Mr Trump tweeted on Sunday: "I believe the James Comey leaks will be far more prevalent than anyone ever thought possible".
The U.S. Secret Service says it doesn't have any recordings or transcripts of any tapes recorded within President Donald Trump's White House.
White House Press Secretary Sean Spicer said whether Sessions answers "depends on the scope of the questions", and refused to get into any detail about what conversations the two had about Comey's firing.