It recommended clamping down on a law that lets Egyptian officials hand-pick judges for certain cases.
But Mrs Clooney, 36, was told she could be locked up if it was published.
“They said ‘Does the report criticise the army, the judiciary, or the government?’ We said ‘Well, yes’.”
The British barrister said: “When I went to launch the report, first of all they stopped us from doing it in Cairo.
“They said ‘Does the report criticise the army, the judiciary, or the government?’
“We said ‘Well, yes’. They said ‘Well then, you’re risking arrest’.”
Mrs Clooney said the judge-picking issue was key to the case of the three al-Jazeera TV journalists jailed in Egypt amid an international outcry.
She represents Mohamed Fahmy who was arrested in December 2013 along with colleagues Peter Greste and Baher Mohamed.
They were sentenced to between seven and ten years in prison last June by controversial judge Mohamed Nagy Shehata.
Last week an Egyptian court ordered a retrial for the three men but Mrs Clooney said that doesn’t mean much.
She said the recommendation to stop judges being selected “wasn’t followed”, adding: “We’ve seen the results of that in this particular case where you had a hand-picked panel led by a judge who is known for dispensing brutal verdicts. And this one is no different.”
They insist they were just doing their jobs. All three of the journalists are still in custody in Cairo.
They met through a mutual friend at a charity fundraising event a year earlier.
George had joked in an email: “The hottest man in the world should meet the hottest human rights lawyer.”
By ISOBEL DICKINSON /