21 cards where the text includes “suspend” and the color identity ≤ RUW and the mana value < 3

Ancestral Vision (Time Spiral Remastered #52)
Clockspinning (Time Spiral #53)
Delay (Time Spiral Remastered #61)
Epochrasite (Commander Anthology Volume II #187)
Fury Charm (Iconic Masters #130)
Glimpse of Tomorrow (Modern Horizons 2 #129)
Inevitable Betrayal (Modern Horizons 2 #47)
Jhoira's Timebug (Time Spiral Remastered #269)
Lotus Bloom (Time Spiral Remastered #270)
Mox Tantalite (Modern Horizons #226)
Restore Balance (Time Spiral Remastered #36)
Resurgent Belief (Modern Horizons 2 #26)
Rift Elemental (Time Spiral Remastered #185)
Rory Williams (Doctor Who #153)
Rose Tyler (Doctor Who #5)
Sinister Concierge (New Capenna Commander #30)
Sol Talisman (Modern Horizons 2 #236)
Suspend (Modern Horizons 2 #68)
Timebender (Time Spiral Remastered #93)
Timecrafting (Planar Chaos #109)
Wheel of Fate (Time Spiral Remastered #198)

The message was clear to Sorin—time to search for something else.