Snider was eligible to come off the seven-day disabled list on Saturday but after going through batting practice he was deemed not ready to play.
The same result happened each of past two days and Snider will remain a game-time decision until the pain completely goes away.
"While three days ago it seemed like if he got through it he was going to be in the lineup that night, I think he is wanting to be sure that thing is completely out of there before he is full go," Blue Jays manager John Farrell said.
Snider was cut from the Blue Jays roster during the final week of Spring Training after losing the starting job in left field to Eric Thames. The 24-year-old is hitting .400 with four home runs and 23 RBIs in 19 games for Las Vegas this season.
Left-hander Brett Cecil received more encouraging news this week. Toronto's former No. 3 starter was activated from the disabled list in Double-A New Hampshire on Tuesday. Cecil had missed the past three weeks with a strained groin and is expected to throw four innings or 60 pitches on Wednesday.