However, speaking ahead of Liverpool's Premier League clash against Swansea City on Monday, the German boss has promised to give his English midfielder enough game-time so that Lallana can win back his place in Gareth Southgate's squad for the World Cup in Russia.
Klopp said: "He will be an England starting player again for sure. If Mr Southgate can afford to leave Adam Lallana out of his World Cup squad, then I can already congratulate on winning the World Cup because I can't imagine how strong your squad is."
"Adam was out for half a season and he requires all his physical strength, like every player. But we need him. Really need him for the rest of the season. He is really close to being 100 per cent."
The German concluded: "So far, he's played with all the genuis moments, very decisive moments, you could see that he really feels the intensity. He had a big muscle injury so we can not push him through, and say 'Come on, try it again, try it again'. That is impossible."
Lallana will be one of the players that the manager will look to after the departure of Philippe Coutinho to Barcelona at the beginning of January. The 29-year-old has made 131 appearances for the Merseyside club, scoring 21 goals, since joining from Southampton in 2014.