Visiting at all Irish prisons is being suspended in an effort to slow the spread of COVID-19.
The Irish Prison Service had already placed restrictions on visiting, limiting numbers and the length of time visitors could stay.
However from tomorrow, no prisoners will be allowed to have visitors.
Senior Government Official Elizabeth Canavan says prisoners will instead have "electronic visits".
"The Irish Prison Service has made every effort to run normal family visits for as long as possible.
"However, in the best interests in the health and safety of prison staff, prisoners and their families, from tomorrow normal physical visits will no longer be possible.
"Physical visits will be replaced with electronic visits via internet platforms, video links and video forms."
