The 30-year-old is expected to be back playing for Liverpool this month
Scans have confirmed he suffered only a minor groin strain while training with the national team on Tuesday.
The 30-year-old missed the summer’s World Cup following a season disrupted by injury but is expected to be available again before the end of a month that includes Liverpool’s first Champions League fixture of 2018/19, against Paris St Germain.
“I’m pleased I’ll be back available for Liverpool, both domestically and in the Champions League during September, and then England again for the next break,” Lallana told the club’s official website.
“It’s a minor setback, which isn’t ideal, as I’ve been in great shape until now but it’s positive news that it’s only a brief lay-off.
“I know I can make a significant contribution over the course of a long season and that’s where my focus will remain, with so much to play for.
“Doing my best and giving everything for my team-mates, management and supporters of club and country is all that matters.
“I’m back at Melwood making sure my time off the pitch is as short as possible, so I’ll be supporting Gareth and the boys from up here.”