William Barr in the third paragraph to this letter to Congreff says: "Separately, I intend to consult with Deputy Attorney General Rosenstein and Special Counsel Mueller to determine what other information from the report can be released to Congress and the public consistent with the law, including the Special Counsel regulations, and the Department’s long-standing practices and policies. I remain committed to as much transparency as possible, and I will keep you informed as to the status of my review."
http://www.nytimes.com/2019/03/22/us/politics/barr-letter-mueller.html