Schumacher, 37, announced after winning Sunday's Italian Grand Prix that he will call time on a racing career that has netted him a record seven world titles at the end of the season.
But his replacment, Finn Kimi Raikkonen, will not be released from his McLaren contract in time to test before the end of the year - meaning the team could fall behind on development.
And Baldisserri has pleaded with team boss Jean Todt to involve the 90-times race winner in their winter testing programme rather than move into an expected ambassadorial role with the company.
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Baldisserri told Gazzetta dello Sport: "Schumacher has been with us for 11 years and I can say he's brought everything we have now.
"He's given us precious suggestions on work methods and he's been a role model not only at the wheel, but also in his professional approach.
"It will be a big problem to carry on at the same level without him.
"I don't know Raikkonen well: we only have information from the engineers who worked with him at Sauber.
"Well, when he gets inside the car he gets his job done very well, he's very quick, but Schumacher knew how to do other things too and created an incredible relationship with the team."
Ferrari currently have two test drivers. Italian Luca Badoer and Spaniard Marc Gene - both former F1 drivers themselves.
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