text: can you appeal against a supreme  court decision  in canada? my friend and her hubby have a child they have been caring for for the past 2 yaers since she was 3 months old ......they have already adopted her half brother a few years back and was hoping to adopt his sister. the very fact that this child was in foster care , was because she had to be taken away from her mother because her mum was a druggie and she had 10 kids the majority of which was born high due to their mothers  drug use......so this baby has a safe and happy home , has her own blood brother she is growing up with ...and now after 2 years of court cases and appeals the auntie has won custody of this child . this child is now going to be exposed all over again to the stupid parent that put her in the system to begin with....because the auntie and her are sisters. the supreme court of canada made the decision ..what can be done to appeal this ? the lil brother is devastated that his sister is going to be taken away on friday.can this decision be overturned ?or an injunction? supreme court decisions, by definition, cannot be appealed.  they are the court of last resort.  they don't call them "supreme" for nothing.  once your case has reached the supreme court of whatever jurisdiction you may happen to live in, you're done.  if we were talking about, say, the supreme court of alberta, you could theoretically appeal to the supreme court of canada, but as you were already there, you have exhausted your legal options.