http://www.techradar.com/news/tesla-model-3

Update: The Model 3 has hit a production bottleneck, meaning that it has fallen far behind the estimates that Tesla CEO Elon Musk originally predicted for delivery. In a series of tweets Musk originally claimed that by December of 2017 the Tesla plant would be producing 20,000 cars a month, but presently only 260 of the cars have actually made it out of the doors. 

In a phone call to members of the press, Musk pushed back his estimation of 15,000 cars a month to early 2018.