I replaced all the 4 struts(monroe) and rear strut mounts 2 weeks back and today while driving home I heard a heavy noise from rear right and I noticed that strut is fully compressed down and hitting the corner of car and not moving up or down at all. Is this the bad strut that I got or what can be the possible issue?

Thanks
--rubs

guess so... is there an oily residue, showing that the seal had leaked the oil out of that strut?

hope you have your receipt for a warranty replacement... and the shop will have to r & r and align the car again under warranty

bring it back to the shop ASAP!

... not moving up or down at all. Is this the bad strut that I got or what can be the possible issue?

Thanks
--rubs

Possibly the rod end nut was (?) loose, now is gone; take rear seat out and check the mount. Whatever, it has to be taken out for inspection.