I took my bifold doors off to my laundry room because I had a washer and dryer delivered. Well the dryer is deeper than the old one it sticks out 3 inches pass the track. Any suggestions on how to put these doors back on or something else to use other than the doors. I can't move the track further out unless the frame is built out and I'm not sure about that. Any suggestions on hiding the washer and dryer Thanks

A quick and easy method would be to put a curtain rod on the outside of the wall and hang a curtain over the opening.

Curtain will work except it will look like a pregnant curtain. We screwed up on a habitat house we were building and had to thicken the wall. Ended up with a 3" width along the hall. Furred it out, drywalled and painted. Called it an "architectural detail". The only way to get the original doors to fit is to do about the same, if you have space. If not, use the curtain method but I hope it's not too obvious.

If dryer exhaust vent comes out the back can it be moved to the side. Are you using one of those oval or square dryer exhaust adapters that minimize required clearance behind dryer?
If you have minimized rear clearance post back for my suggestion of how to extend door frame.