Inclusion Criteria:

• Provision of signed and dated informed consent form.
• Subject is 18 years of age and older.
• Subject has a diagnosis of unresectable Stage 3 pancreatic adenocarcinoma cancer cytologically or pathologically confirmed per American Joint Committee on Cancer (AJCC) staging criteria.
• Subject has a tumor evaluated as Stage 3 according to National Comprehensive Cancer Network (NCCN) guidelines, based on radiographic imaging or exploratory surgery.
• Maximum axial and anterior to posterior tumor dimension of ≤3.5cm, after receiving three months of treatment with the modified FOLFIRINOX regimen.
• Subject has received 3 months of treatment with the modified FOLFIRINOX regimen.
• Subject has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
• Subject has an American Society of Anesthesiologists (ASA) classification of physical health status of 1, 2, 3 or 4.

Exclusion Criteria:

• Subjects who are or may be pregnant as determined by a positive pregnancy test or breastfeeding or male or female patients of reproductive potential who are not willing to employ highly effective birth control from screening to 6 months after the last dose of chemotherapy.
• Subjects who are unable to tolerate general anesthetic with full skeletal muscle blockade.
• Subjects who are actively bleeding, anticoagulated, coagulopathy, or have any of the following hematology results:
  • hemoglobin less than 10 g/dL without the support of growth factors or transfusion; absolute neutrophil count less than 1500 cells/mL; or
  • platelet count less than 100,000.
• Subjects with the presence of implanted cardiac pacemakers, defibrillators, electronic devices or implanted devices with metal parts in the thoracic cavity at the time of IRE.
• Subjects with history of epilepsy or other neurological disease.
• Subjects with renal, cardiac, liver, or hematological abnormalities of concern to the investigator.
• Subjects with Stage 3, 4, or 5 chronic kidney disease.
• Subjects receiving IRE for margin accentuation.
• Subjects who at 3 months after FOLFIRINOX treatment have evidence of disease progression.
• Participation in another interventional trial for pancreatic cancer.
• Subjects who did not meet study defined criteria for adequacy of induction treatment at the end of the 3 months.