UHK management implemented the restrictions with immediate effect on Monday evening.
University Hospital Kerry has reimplemented visiting restrictions after a "significantly increased number" of covid-19 cases and emergency presentations.
The hospital's management reimplemented the restrictions on Monday evening.
"Our priority is to keep you and your loved ones safe, thus University Hospital Kerry has taken the decision to put in place measures to ensure that visiting takes place on as safe a basis as is possible," a spokesperson for the hospital said.
UHK management said mask wearing and full hand hygiene now applies to all visitors.
Non-covid positive patients on general hospital wards will be limited to one visit per patient per day, with timings to be agreed with the visiting co-ordinator.
Visitations outside designated times will be permitted only on compassionate grounds, the hospital said.
On maternity wards, accompanying partner arrangements remain unchanged.