http://www.cic.gc.ca/english/immigrate/sponsor/spouse-apply-who.asp
an offence of a sexual nature,
a violent crime,
an offence against a relative that resulted in bodily harm or
an attempt or threat to commit any such offences, depending on the details of the case, such as
the type of offence,
how long ago it occurred and
whether a record suspension was issued (see Sponsorship bar for violent crime below)
If you have been convicted of a crime that caused bodily harm to any of the relatives below, you cannot sponsor anyone under the Family Class.
Note:
“Partner” includes common-law and conjugal partners.
Relatives not listed here may still fall under this category. If you are not sure, check the full list of rules or contact the office processing your application.
Relatives the sponsorship bar can apply to:
your current or ex-spouse/partner and/or their children,
your children,
your parent/grandparent, child/grandchild, sibling, niece/nephew, aunt/uncle, or cousin, or
the current or ex-spouse/partner and children of the above
the parent/grandparent, child/grandchild, sibling, niece/nephew, aunt/uncle, or cousin of your current or ex-spouse/partner or children, or
the current or ex-spouse/partner and children of any of the above
your child’s spouse, partner or children,
your spouse’s, partner’s or child’s ex-spouse or ex-partner and children,
your partner’s parent/grandparent, child/grandchild, sibling, niece/nephew, aunt/uncle, or cousin, or
the current or ex-spouse/partner (and their children)of any of the above,
a foster child who is or was cared for by
you,
your current or ex-spouse/partner or their children,
your parent/grandparent, child/grandchild, sibling, aunt/uncle or cousin, or
the current or ex-spouse/partner (and their children) of any of the above, or
your current or ex-boyfriend/girlfriend, their spouse or common-law partner, and their dependent children.