1. Building for Professions (36100)

This is the breadcrumb quest which lead you to build a professional building. I cannot find this quest when I already updated my garrison to level 3.
After I finished Garrison Campaign: Every Rose Has Its Thorn (36160), the quest giver Baros Alexston will not in the garrison anymore.

2. Shadowmoon Invasion! (37289)

This quest seems like a low level invasion. When you reached max level, this quest will become unavailable and be replaced by a new high level invasion with the same name (36412).

3. He's Gone Mad! (50466)

This is the breadcrumb quest and will be unavailable if you already finished the follow on quest Hunting the Hunter (47586).