Groupthink

n. tendency toward conformity; belief that some decisions should be made by a group (rather than an individual); lack of individuality and creativity

Groupthink is a type of thought exhibited by group members who try to minimize conflict and reach consensus without critically testing, analyzing, and evaluating ideas. During Groupthink, members of the group avoid promoting viewpoints outside the comfort zone of consensus thinking. A variety of motives for this may exist such as a desire to avoid being seen as foolish, or a desire to avoid embarrassing or angering other members of the group. Groupthink may cause groups to make hasty, irrational decisions, where individual doubts are set aside, for fear of upsetting the group’s balance. The term is frequently used pejoratively, with hindsight.
See more at Wikipedia.org...

Noun
1. decision making by a group (especially in a manner that discourages creativity or individual responsibility)
(hypernym) decision making, deciding

A situation in which critical information is withheld from the team because individual members censor or restrain themselves, either because they believe their concerns are not worth discussing or because they are afraid of confrontation.