Introduction: Gastrointestinal stromal tumors (GISTs) are nonepithelial tumors arising from the interstitial cells of Cajal, which express KIT protein-CD117 on immunohistochemistry. It represents a wide clinical spectrum of tumors with different clinical presentations, locations, histology, and prognosis. Gastro intestinal stromal tumours (GISTs) can arise anywhere in the GIT, including the mesentery, omentum, and retroperitoneum. Because most of these tumors are submucosal in location, they usually attain a large size without causing bowel obstruction at the time of diagnosis. This report presents a case of GIST in a 30-year-old male. The patient presented with acute abdomen without any symptoms of obstruction or perforation. He underwent ultrasonography in the radiology department which revealed a large mass along the small bowel with deposits along the mesentery and space occupying lesions (SOLs) in the liver. On contrast-enhanced computerised tomography (CECT), a possibility of GIST with deposits along the mesentery and liver was given, which was confirmed by histopathology. Conclusion: Recognition and acquaintance with GISTs is primarily important for early detection which allows for more treatment options. These tumors are rare in people younger than 40 years of age, but can occur in people of any age.