The 27-year old centre-back played a full 90 minutes as the Hoops held Elfsborg to a 0-0 draw at the Boras Arena on Wednesday night to win their third round Champions League qualifier 1-0 on aggregate but Lennon feels his £2.5million transfer back to Nottingham Forest is imminent.
"I would say it was Kelvin's last game for us. I don't think it (the deal) is far away," said Lennon.
"I would say he would be away over the next couple of days.
"If it is then he could go away with his head held high, I thought he was fantastic tonight for us and he will be a huge miss.
"We chatted to him beforehand, he was in the right frame of mind and didn't want to let the team down and he certainly didn't, I thought he was awesome."