Chapter 27 - S3-E1
Visible crew/equipment: A reflection of a cameraman is visible in Frank's watch as he reassures Doug that he has a place at the White House. (00:40:30)
Chapter 29 - S3-E3
Continuity mistake: While the first lady and secretary are playing beer pong, the secretary makes the first shot of the scene. After the first lady drinks the beer, you see two glasses in front of her and the one on the left has a ping pong ball in it already. The first lady takes her shot and misses, so the secretary goes again and makes it in the same glass we saw earlier that already had a ball in it. (00:37:00 - 00:38:00)
Chapter 35 - S3-E9
Factual error: When Doug Stamper sits down at his laptop and throws the contents of his cup at the screen, the image immediately freezes and distorts. This would not happen so quickly in a real world event. It may eventually happen but not instantaneously. (00:23:10)
Chapter 39 - S3-E13
Character mistake: When Dunbar holds up a copy of the Wall Street Telegraph, there is a spelling mistake in one of the stories above the masthead. It reads, "NIGHTMARE: Woman sleepwalks on major higway, dies". (00:08:50)
Chapter 39 - S3-E13
Continuity mistake: In one scene, Claire Underwood is returning to the White House from Iowa. In the hallway leading to her bedroom's stairs, she is followed by a black female Secret Service agent, obviously part of her entourage, who stops to stand guard at the beginning of the stairs. In another scene 30 minutes later, that same agent is seen standing guard at the entry of the campaigning house in which Frank Underwood is going to say his victory speech. But Claire has not flown from Washington to Iowa, so the agent should not be there. (00:15:15 - 00:45:30)