Jason Sudeikis had to beg fans to back off during a recent outing … telling autograph seekers he’d really gotten freaked out while leaving a club and just wanted to go home.

Eyewitnesses tell TMZ … there were about 15-20 fans seeking autographs outside the Dynasty Typewriter Comedy Club in L.A. to wait for Jason beginning around 6:30 PM. We’re told he left the club around 9:30 PM.

When he got outside, he signed one or two autographs — and, the rest of the fans sorta rushed him, asking him to sign for them too.

Watch the clip … there are a few guys following JS down — and at least one guy who seems to walking lockstep with Jason before he stops and asks them to leave him alone.

He tells them the interaction outside the club — getting crowded by so many people at once — “scared the s***” out of him … and, he says he’s now heading to his car and he’s not signing anything else.

Listen to his voice … the star’s clearly shaken — and, he’s almost begging these fans to let him get on with his night.

Jason’s not the first celeb to get overwhelmed by all the attention in public … remember, last month Chappell Roan ripped fans for crosing boundaries — telling them to respect her space when they spot her on the street.

Seems Jason felt a similar way Saturday night … and, he let his fans know about it.