Statistics Canada says real gross domestic product grew 0.1% in August, following no change in July.
Economists on average had expected growth of 0.2% for the month, according to financial markets data firm Refinitiv.
Statistics Canada says 14 out of 20 industrial sectors posted gains.
A rebound in manufacturing helped goods-producing industries rise 0.2% after two months of declines.
The manufacturing sector grew 0.5% as durable manufacturing rose 1.0%, while non-durable manufacturing fell 0.2%.
Services-producing industries edged up 0.1%.