The Japan international, who has netted 21 times this season, had been banned for two games after being sent off in Celtic's penultimate match of the league phase against Young Boys.
However, the Scottish champions said on Monday that the suspension had been reduced to one game on appeal.
The 27-year-old served the ban in a 4-2 defeat at Aston Villa last month.
Maeda has scored five goals in his past two games and gives Celtic hope of springing an upset on their return to the knockout phase of the Champions League for the first time in 12 years.
"He's got to be one of the most in-form players in all of Europe right now," said Celtic defender Alistair Johnston earlier on Monday.
"He can't seem to miss right now. When he's scoring and creating he adds just another dimension. But also everyone knows his work rate is unbelievable."
