The forward has missed the first fortnight of United's first-team campaign due to a three-match ban incurred at the end of last term, but he completed his suspension during Sunday's 1-1 draw with Nottingham Forest.
Leeds have attempted to maintain his fitness with regular outings in their reserve side, and he scored in a friendly at Bradford Park Avenue seven days ago, but he was spared from action this evening prior to a possible introduction to Leeds' Championship campaign this weekend.
The club planned to fully involve Somma in their Championship games but have so far been denied the use of a player who struck nine times in 14 outings while on loan with Lincoln City last season.
Few of United's senior players are expected to play against Gateshead, though transfer-listed players Andy Robinson, Lubomir Michalik and Alan Sheehan will feature in tonight's 7pm kick-off at the International Stadium.