@marquesdi, welcome. Yes, Canadians can request appointments without a doctor referral. You can fill out the online application on behalf of your mother. See the link for international patients and further information here: http://mayocl.in/1mtmR63

Here is more information for Canadian patients https://www.mayoclinic.org/canada

Marquesdi, is your mom able to travel? May I ask what province your mom lives in?