Loanee returns to Cardiff.
"It only happened this morning and it's a shame because he'd just got back into the starting line-up.U's boss Tony Humes told the pre-match press conference on Thursday: "It's disappointing that we've lost Rhys.
He made nineteen appearances in his time in north Essex, and hit the net on four occasions.
The loanee has been with the U's since September last year, but returns to South Wales after being called back by boss Russell Slade. Rhys Healey has been recalled by Cardiff City.
"We've been really pleased with his contribution to our cause over the past months and wish him well back at Cardiff."