Earlier Thursday, Barr defended his conclusion there was no evidence of obstruction of justice by President Donald Trump.
The redacted report, which is nearly 400 pages, will fill in some -- but likely not all -- of the details explaining what Mueller's team uncovered during the 22-month investigation that's hung like a cloud over Trump's presidency while the special counsel investigated possible collusion between Trump's team and Russia and any possible obstruction of justice.
Barr said at a press conference Thursday morning that Mueller's report did not find "collusion" between the Trump campaign and the Russian government.
"After nearly two years of investigation, thousands of subpoenas, and hundreds of warrants and witness interviews, the special counsel confirmed that the Russian government sponsored efforts to illegally interfere with the 2016 presidential election, but did not find that the Trump campaign or other Americans colluded in those schemes," Barr said.
Mueller's investigation examined 10 episodes involving the President and potential obstruction of justice, Barr said.
Mueller did not make a "traditional prosecutorial judgment" on the obstruction question, Barr said. Instead, Barr said he concluded the evidence was "not sufficient to establish that the President committed an obstruction-of-justice offense."
"The President took no act that in fact deprived the special counsel of the documents and witnesses necessary to complete his investigation," Barr said.
"Apart from whether the acts were obstructive, this evidence of non-corrupt motives weighs heavily against any allegation that the President had a corrupt intent to obstruct the investigation," he added.
Barr said the President's lawyers were permitted to read the redacted version of the report, but the President would not assert executive privilege.