Canada's seasonally adjusted Ivey purchasing managers' index fell to 53.1 in October from 53.7 in September. Analysts had expected the index to increase to 54.0.
A reading above 50 indicates a rise in the pace of activity, below 50 indicates a contraction in the pace of activity.
The supplier deliveries index was up 51.9 in October from 49.8 in September, while employment index dropped to 48.3 from 57.1.
The prices index was decreased to 61.8 in October from 64.4 in September, while inventories fell to 46.6 from 52.1.