No, Shizuka does not marry Dekisugi. She marries Nobita in the Doraemon series.
While Dekisugi is portrayed as a very intelligent, capable, and popular character, and a supportive friend to both Nobita and Shizuka, the primary storyline focuses on the relationship between Nobita and Shizuka, ultimately culminating in their marriage. Dekisugi's romantic life is not a central focus of the series, and he is not shown marrying anyone within the canonical narrative. He remains a close friend to Nobita and Shizuka.
