A 42-year-old woman from rural Maharashtra presents with postcoital bleeding and vaginal discharge for 3 months. She is a tobacco chewer and has been married since age 18. On examination, a 3 cm ulceroinfiltrative lesion is seen on the cervix. Pap smear shows high-grade squamous intraepithelial lesion (HSIL). Colposcopy-directed biopsy confirms invasive squamous cell carcinoma. MRI pelvis shows the tumor confined to the cervix with no parametrial involvement, and no lymph node enlargement. Cystoscopy and sigmoidoscopy are normal. What is the FIGO 2018 stage of this cervical cancer?