Easily. First of all it would be highly unlikely and extremely rare (except in those stupidass wild card games) where you'd even need all of the cards anyway. Enough people will drop out by the end to eliminate the issue.
However, the rule in place is simple. If it were to happen and you ran short on cards for the last round of dealing, then instead of dealing out to everyone like normal, you would instead deal a single card into the center of the table to be used by all as a community card (just like the cards are used in hold'em and omaha).