Those attending them are being asked to double down on health guidelines.
Livestock marts sales will continue to be a blend of online and ringside, under the new Level 5 restrictions.
Farmers are asked to conduct their business online, where possible.
Buyers may continue attending the sales ring and view stock in pens, but appointments must be booked in advance.
And sellers must leave the mart after dropping off their stock.
Westmeath chair of the Irish Farmers' Association, Bernie McCarthy is appealing to those who do attend, to adhere to public health guidelines:
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