The Calgarian finished second in her heat with a time of 12.75 seconds. The semifinals will be held Tuesday.
"This was my warmup day and tomorrow will be my race day," said Zelinka.
She'll be joined by Phylicia George of Markham, Ont., and Nikkita Holder of Pickering, Ont., who also made it through qualifying.
Zelinka is looking to rebound from a disappointing seventh-place finish in the heptathlon over the weekend. She elected to rest on Sunday and wasn't sure exactly what to expect after returning to competition.
"I'm just glad I found my legs again and this is just like a reminder saying, 'Body, you're not done, and tomorrow, keep it going even more,"' said Zelinka.
It was a productive morning session for Canadian athletes.
Geoff Harris of Halifax advanced in the men's 800 metres with a personal-best time of 1:45.97 while Hilary Stellingwerff of Grand Bend, Ont., and Winnipeg's Nicole Sifuentes each qualified for the semifinals of the women's 1,500 metres.
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