Memory Suppression Defined.

Memory Suppression - The state of having your memories of being transferred into a clone body artificially blocked, resulting in you being unable to clearly remember experiences of REM Cloning during waking hours. Leading to nightmares, unexplained depression and illness. You may get vague inklings of things that have happened but unless they un-suppress you memories intentionally you will find the more you try to remember the harder it is to not forget, its as though a blurry haze is over everything and your memories will seem strange because in the dreams that you suspect might be REM Cloning you behave a certain way then will wake up and wonder why you behaved that way and didn't have awareness enough to behave differently, as if you've been regressed back to the mentality of a child. Meditation and concentration can sometimes help recalling suppressed memories.

References - Inception, Doctor Who, Dollhouse, Manchurian candidate, Death Note, Bush- Letting the cables Sleep

Notes- if you click this link to the Bush- Letting The Cables Sleep song it shows you a representation guy who has cloned a girl into a room, the room is somewhere in the world with them as clones and he has sex with her there but she doesn't remember him in real life and in the video is revealed to be deaf. I will explain more about this subject later but Thats what that music video shows. For more references look to look to the Matrix or other shows involved a main character with amnesia or under mind control, you often find hints there.
Also having memories un-suppressed is usually done around 30 and the process is known to Them as "The Awakening"