I believe that John 14:1-3 speaks of Christ's return at the Rapture for His church. However, many who do not believe that the Rapture will occur before the tribulation say that this passage refers to Christ coming at death for a believer. There are good reasons why this passage is Christ's introduction of the Rapture of the church.
Ice, Thomas D., "The Rapture and John 14" (2009). Article Archives. 41.