Sidetrack
Taken from oxford dictionary:
Verb
1. Cause (someone) to be distracted from an immediate or important issue.
“He does not let himself get sidetracked by fads and trends”
2. Direct (a train) into a branch line or siding.
“The train is sidetracked onto a line leading to a terminal”
Noun
1. A minor path or track.
“The horse took a sidetrack which led uphill”