Toronto police were called to the scene of a shooting outside 44 Willowridge Rd., just after 2 a.m. on Saturday.
At the scene, they found Trevor Seraphine suffering from multiple gunshot wounds.
The teenager was rushed to a Toronto hospital, where he was pronounced dead.
His sister, Xabie Seraphine, told CBC News that police have said her brother was shot five times and he may have been mistakenly targeted.
She had persuaded their mother to send her brother to Canada from St. Lucia, so he could have a better life.
Now Xabie is hoping to raise money through crowdfunding to pay for his funeral.
Police are still investigating Trevor Seraphine's death. They are collecting surveillance video from the area where he was shot and are asking for witnesses to come forward.