From BMO website,
Take a Break Option*
If money gets tight you can skip up to one month of mortgage payments (principal and interest) per calendar year. Some restrictions apply so ask your mortgage representative for details. Choose to skip:
1 monthly payment
Up to 2 consecutive bi-weekly or semi-monthly payments
Up to 4 consecutive weekly payments
Family Care Option*
Skip up to 4 months of mortgage payments (principal and interest) once per year if you or your partner must leave your job to care for a new baby or a sick family member. Some restrictions apply so ask your mortgage representative for details. Choose to skip:
4 consecutive monthly payments
8 consecutive bi-weekly or semi-monthly payments
16 consecutive weekly payments
Keep in mind, any time you skip a mortgage payment, you continue to accrue interest. This means you’ll pay more over time. Pay back your skipped payments anytime without penalty.
*Take a Break or Family Care Options are not available with the Low-Rate Fixed Closed Mortgage, Take a Break and Family Care options apply to principal and interest payments on conventional and Genworth/CMHC-insured mortgages for owner-occupied single-family dwellings only, including condominiums and duplexes. For mortgages insured against default, customers must have prepaid principal at least equal to the amount of payment(s) to be skipped. Any mortgage insurance premiums and tax payments cannot be skipped. For MICC mortgages, only the Take a Break option is available. The Family Care option is not available to self-employed individuals. Customers currently receiving Mortgage Disability benefits (provided by Sun Life Assurance Company of Canada) are not eligible for skipped payments. Interest for the skipped payment is added to the principal. The balance of your current mortgage plus the skipped payment must not exceed the original amount of your mortgage with us. For conventional uninsured mortgages, the balance of your current mortgage plus the skipped payment must not exceed 80% of the lesser of your home’s present value or the original amount of your mortgage with us.