Following an opening day reverse against Aston Villa, the young Foxes travelled to East Anglia for their second successive away day of the 2020/21 campaign this weekend.
City found themselves 2-0 down early on in Norwich as Canaries youngster Thomas Dickson-Peters netted a brace of goals before the 11th minute.
Leicester hit back, though, through Welsh striker Will Russ, but their hopes of a comeback were short lived as Tony Springett and then Joe Duffy struck for the home side.
Ben Nelson got one back for the Club's Under-18s, however, and it ended 4-2 to leave Leicester in 12th place in the early U18 Premier League South standings.
Next up, on Saturday 3 October, the young Foxes travel to Bearwood Park Training Ground to tackle Reading in a 12pm BST kick-off in Berkshire.
City: Bosworth; Kutshitnza (K. Pennant 45'), Nelson, Obi, Marcal-Madivadua; Booth, Maswanhise, Cover, Fitzhugh; Russ, T. PennantÂ
Subs not used: Weeks, Grant, Cook
Goals: Russ 22', Nelson 55'