Buses for Ribariće depart from Novi Pazar’s bus terminal at 8:00, 9:00 and 10:50, followed by numerous afternoon buses.
You can look up the timetable on the website polazak.com, and be sure to type in ‘RIBARICE KOD TUTINA’ as the destination.
Throughout my travels across Serbia, I found polazak.com to be very accurate. But I was dismayed when it only listed return buses from Ribariće to Novi Pazar beginning in the late afternoon.
Taking the 9:00 bus, walking to the monastery, spending time inside and walking back, I was already back at the bus stop at around 12:30. Once there, I was expecting to have to wait for a few hours for the next bus to come.
Fortunately, to my surprise, a bus appeared after 30 minutes or so. It looked like a large city bus and it was headed straight for Novi Pazar.