Is a social process in which individual group members lose self-awareness and its accompanying sense of accountability, inhibition, and responsibility for individual behavior.

The answer to this question is loss of individuality
When people experiencing loss of individuality, that person tend to forget all of his/her potential as a human being and will experience life without any form of passion. This will lead them to lose a sense of accountability and responsibility that might lead to depression or suicidal thought

Deindividuation is the process in which people lose their sense of the fundamental social aspects of a group, such as interest in work and responsibility. The members of a group lose interest individually and disappear the inhibitions provoking the lack of commitment and group identity and the occurrence of the individualism as part of a social phenomenon.