It is recommended you renew your passport prior to travel. You can request the urgent processing (24 hours) if you submit your application at a Passport Canada Location. You are required to provide proof of urgency (for example; present your flight ticket). To make the process easier you can use the ‘simplified Renewal Application? form.
As you are short by one-day of the 3-month deadline please contact Foreign Affairs and International Trade Canada to confirm if it is essential to renew the passport prior to travel.