The university said in a statement that Mr. Simons had “repeated his explicit wish that his son should obtain his bachelor’s degree at the age of 9,” which the university considered not feasible given the exams he still needed to pass.

Mr. Simons rejected an offer in which Laurent would have graduated next year without a specific deadline, arguing that such a delay was unacceptable. The university had used his son “like a Christmas tree,” he said, a glittering ornament that made the institution shine.

“He wasn’t making it,” the university spokesman, Ivo Jongsma, said about Laurent’s previous graduation plans. “But of course it wasn’t a problem for us,” he added. “He’s a genius; he would still have been one of the fastest ever” to graduate from a university.

Laurent made international headlines last month when his parents publicized the news that he would graduate with a degree in electrical engineering by the end of the year. He had enrolled at the Eindhoven university in March, and his mentor there, Prof. Peter Baltus, said that Laurent was on track to finish a three-year program in just 10 months. “His absorption capacity is very high,” Professor Baltus said.

In a phone interview last month, Laurent said he wanted to study medicine, get his doctorate and make artificial organs. He said he wanted to help people like his grandparents, whom he grew up with in the Netherlands while his parents worked in Belgium, and suffered from heart problems.