Defense group Saab's shares fell 1 percent on Monday, and Swedish Mildef also lost 3.7 percent.
In Germany, defense giants Rheinmetall and Hensoldt fell 1.1 and 1.5 percent, respectively.
Italian Leonardo fell 2 percent, and British BAE Systems fell 0.3 percent.
The declines come after US President Donald Trump praised the progress he believes has been made in talks with Ukrainian President Volodymyr Zelenskyj about a possible peace agreement.
