Watch the Unusual Sus-pect online guitar lesson by TrueFire from Blues Guitar Greatest Hits Vol. 1
Lesson Source: Corey Congilio's 50 Blues Rhythms You Must Know!
This example introduces a suspended chord in bar 9 and bar 12.
The chord I’m playing is an E9sus or it can be called D/E. I’m not a stickler for chord names so, call it whatever makes sense to you.
In any case, it’s a cool option that’s not typical or usual so, try it!