Study to Evaluate the Efficacy and Safety of Oral Rilzabrutinib in Adults With Immune Thrombocytopenia (ITP) Who Failed First-line Treatment

Key Inclusion Criteria: * Male or female participants aged 18 years and older with a documented diagnosis of primary ITP in the medical history * Participant received at least one course of first-line therapy and had a history of response while on treatment * Participant has loss of response, relapse, or steroid dependency Key Exclusion Criteria: * Participants with Secondary ITP * Participants with Evans syndrome or history of myelodysplastic syndrome * Participants with history of lymphoma, leukemia, or any malignancy within the past 5 years except for non-melanoma skin malignancy. * Participants with history of solid organ transplant * Participants with history of coagulation or bleeding disorders other than ITP, including genetic conditions, other than ITP * Participant received advanced therapy for ITP or was splenectomized * Pregnancy or nursing The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.