In Stockholm, 22 of the 30 most-traded shares in the OMXS30 index fell. The worst performer was clothing giant H&M, down 3.3 percent. One of the few gainers was gaming operator Evolution, up 2.6 percent.
Defense group Saab's 3 percent drop means the stock has fallen 16.4 percent in one month.
At the close in Stockholm, the exchanges in Frankfurt, London, Paris and New York were also clearly in the red.
US President Donald Trump continues to make threatening remarks about the ceasefire with Iran. A barrel of North Sea oil rose 3.7 percent during the day, and now costs $108.10.
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