Suction is a result of gravity. No gravity, no atmospheric pressure.
Not when the space station or your tire has a leak.
That’s actually a good statement for a thread on quantum theory because it’s true and not true at the same time. It’s not true that gravity causes gas pressure. Gas pressure is strictly an electromagnetic interaction, namely the force exerted by particles of gas on anything immersed in the gas. An enclosed container of gas in a zero-g environment would have exactly the same pressure in a gravitational field.
However it’s also true because without gravity the molecules that make up our atmosphere would fly off randomly into space and we would therefore not have an atmosphere. Thus no gravity means no atmospheric pressure.