Let's say for example that the bowler delivers the ball, there is a very faint edge from the batter and the catch is very close the the ground. The standing umpire gives the decision not out, as they believe the batter did not hit the ball. The fielding team disagrees and calls for a review.
The technology determines that the batter did indeed hit the ball and the decision comes down to the catch. However, for whatever reason, say obscured camera angles, the third umpire is unable to determine whether a fair catch has been made or not, and therefore would presumably tell the on-field umpire to stick with their original decision.
Does the fielding team lose their review as the third umpire is unable to make an informed decision?