The announcement means no fans from Ireland or the UK permitted to travel.
A revised schedule has been issued, with all matches in Cape Town, Johannesburg, or Pretoria.
The warm-up game against Japan at Murrayfield will still proceed as planned on Saturday 26th June.
Two Irish Lions will go head to head this evening, Tadhg Furlong and Iain Henderson will both start for their respective provinces.
Leinster host Ulster at 8.15 in the Rainbow Cup
Before that, Munster play host to Connacht at Thomond Park from 6.

Kildare County Council Honours Kildare Senior Football Team with Certificate of Recognition
Wednesday Morning Sports Update
Kildare’s Best Christmas Ho Ho Home Competition
Ireland's James Ryan Received First Career Red Card In Saturday's Game Against South Africa
RDS To Be Known As 'Laya-Arena' After Major Rebrand
Eadestown Tadgh Beirne Included In World's Rugby Team Of The Year
Tuesday Morning Sports Update
Irish Rugby Squad Face Multiple Injuries Woes Following Saturday's Game