Welcome to the boards! This is a common issue for most people new to Starting Strength; "I only get to work out 3 days a week!!!! I can't!!!!"
As a novice, you can't think in term of body part splits, you have to thing in terms of the stress-recovery-adaptation cycle.
For example, you will not be able to recover from the stress of your Monday squat workout in order to progress on your Wendesday squat workout because you deadlifted on Tuesday. Not only is this suboptimal, it is counterproductive. 3 or 4 lifts a day, 3 days a week. Give it a shot, do your fives!