Dr Tony Holohan has said that restrictions on mass gatherings will be in place "for some time".
Groups of up to 50 people will be allowed to meet indoors from June 29, while up to 200 people can gather outdoors.
This could increase to 100 people indoors and 500 outdoors by Phase 4 on July 20, if the virus is kept under control.
And Chief Medical Officer Dr Holohan explained yesterday that these limits are likely to stay in place for "some time" even after the country emerges from lockdown.
He said: "This is one of the areas where I think we need to be really cautious. The evidence on how this virus is transmitted is still evolving, particularly regarding transmission in indoor settings.
"We think it's important we stick with, for now, what we know are restrictive measures in terms of numbers.
"We know that numbers of 50 for the next phase for indoor gatherings of all kinds places a restriction on activities.
"And if we get to a point on July 20, that we hope to get to, of being able to increase that, we know that is still a restrictive number.
"But there are no other countries across Europe trying to increase those numbers, our numbers are broadly in the mid-range of where most countries in Europe are.
"The ECDC has set out in its most recent guidance where it addresses the question of what's likely to be in place for the future after countries have finished the process of easing restrictions, which we hope to get through in the next number of weeks, that restrictions in relation to numbers of mass gatherings are likely to be in place for some time."
It comes after two further people died from the coronavirus in Ireland in the last 24 hours with four new cases.
Dr Tony Holohan announced the latest figures at a Department of Health briefing on Tuesday evening.
There is now a total of 25,383 confirmed cases of COVID-19 in Ireland with 1,717 people having died from the disease.
Chief Medical Officer Dr Holohan said: “On Sunday, more than 183,000 new cases of COVID-19 were reported globally, the most in a single day according to the WHO.
“In Ireland, in the last 14 days over a third of new confirmed cases are in young people under the age of 35. This is not a disease that solely affects older people. No one is immune, everyone is responsible for limiting the spread of COVID-19.”
