Everton have allowed their young defensive trio to stay out on-loan.
Bidwell has been at Brentford since November, has appeared four times and is yet to taste defeat for the Bees.
Irish central defender Duffy joined Scunthorpe back in August and has been a key player for the struggling League One side, making 17 appearances. He scored for the Iron in their Boxing Day defeat to Bury.
Left-back Garbutt has been at League Two Cheltenham since September, racking up 12 appearances for the high-flying Robins.
All three players will remain at their loan clubs until mid-February.