Baartman was part of the Under-23 squad alongside Chiefs teammates Mfundo Vilakazi and Faiz Abrahams for their back-to-back friendly matches against Algeria during the international break.
South Africa won the first encounter 3-1 before the two sides played to a 1-1 draw in the second match.
Chiefs are now preparing to return to competitive action when they host Stellenbosch in a Betway Premiership clash at FNB Stadium next Wednesday, but Baartman's fitness is likely to be a concern for coach Fernando da Cruz.
The club confirmed that its medical team is monitoring the young forward, although no details have been provided on the extent of his injury or whether he will be available for the Stellenbosch encounter.
"Amakhosi return to the pitch after the FIFA international break sitting fourth on the log with 13 points from seven matches, eager to continue their strong start. Stellenbosch, coached by Gavin Hunt and featuring a few familiar former Chiefs players, will arrive determined to climb from their current seventh position, where they hold nine points," the club wrote on its website.
"Chiefs have welcomed back three players who were away on duty with the South African Under-23 national team, adding depth and energy to the squad."
"The medical team is closely monitoring Luke Baartman after he picked up an injury, and updates on his progress, along with other sidelined players, will be shared ahead of the clash."
Chiefs will be hoping Baartman's injury is not serious as they look to maintain their strong start to the Premiership campaign.
The Soweto giants are also expecting a lively atmosphere at FNB Stadium, with the club urging supporters to return in numbers for their first home match in some time.
"Supporters can expect a great evening of football with Amakhosi looking to produce a memorable performance for a home crowd they have not played in front of for a while. The atmosphere at FNB Stadium promises to be electric and the team is calling on the Gold & Black army of fans to come out in numbers to show their passion and pride."
