Statistics Canada released the trade data on Wednesday. Canada's trade deficit widened to C$644 million in November from a deficit of C$327 million in October. October's figure was revised down from a surplus of C$99 million. Analysts had expected a trade deficit of C$0.2 billion.
The decline was driven by falling oil prices.
Exports decreased 3.5% in November. That was the biggest decline since January 2012. Exports of energy products declined 7.8%, while shipments of metal and non-metallic mineral products dropped 8.3%.
Imports fell 2.7% in November.