The squad checked into their training base in Duisburg, Germany over the weekend as they set their sights on Saturday's clash with the two-time World champions.
Celtic defender Keenan is part of the training sessions as she attempts to prove her fitness following a lack of game-time in recent months. She will be assessed over the coming days.
Click here to view a media guide for the Ireland WNT
Republic of Ireland WNT Squad
Goalkeepers: Marie Hourihan (SC Braga), Courtney Brosnan (West Ham United), Niamh Reid Burke (Peamount United)
Defenders: Harriet Scott (Birmingham City), Louise Quinn (Fiorentina), Diane Caldwell (SC Sand), Claire O'Riordan (MSV Duisburg), Aine O'Gorman (Peamount United)
Midfielders: Niamh Fahey (Liverpool), Jamie Finn (Shelbourne), Denise O'Sullivan (North Carolina Courage), Alli Murphy (London City Lionesses), Niamh Farrelly (Peamount United), Megan Connolly (Brighton & Hove Albion), Hayley Nolan (London City Lionesses), Ruesha Littlejohn (Leicester City), Ellen Molloy (Wexford Youths)
Forwards: Katie McCabe (Arsenal), Heather Payne (Florida State University), Leanne Kiernan (West Ham United), Amber Barrett (FC Koln), Rianna Jarrett (Brighton & Hove Albion), Kyra Carusa (HB Hoge)
Germany v Republic of Ireland
UEFA 2021 Women’s European Championship Qualifying – Group I
Saturday, September 19
Stadion Essen
KO 13:00 (Irish Time)
#GERIRL