Main Inclusion Criteria:

          -  Patients with advanced/metastatic TNBC (defined as HER-2 negative with <1% of tumor
             cell nuclei immunoreactive for estrogen receptor (ER) and progesterone receptor (PR)),
             with measurable disease as determined by RECIST version 1.1 (refer to Appendix 16.1).
             Tumor lesions previously irradiated or subjected to other loco-regional therapy will
             only be considered measurable if there is documented disease progression at the
             treated site prior to study entry.

          -  Patients should have received standard chemotherapy for advanced or metastatic disease
             but should not have received more than 2 prior lines of chemotherapy. Neoadjuvant or
             adjuvant chemotherapy will count as one prior line.

          -  Patients must have received prior systemic treatment that included taxane-based
             chemotherapy for neoadjuvant or metastatic disease.

          -  Patients must have a site of disease amenable to core needle biopsy, and be a
             candidate for tumor biopsy according to the treating institution's guidelines.
             Patients must be willing to undergo a new tumor biopsy at screening, and during
             therapy on the study. Exceptions may be considered after documented discussion with
             Novartis. Patients with available archival tumor tissue obtained ≤6 months prior to
             study treatment initiation do not need to undergo a new tumor biopsy at screening, if
             the patient has not received any anti-cancer therapy since the biopsy was taken, and
             if adequate tissue is available.

        Main exclusion criteria applicable to all treatment arms:

          -  Patient has received prior treatment with anti-LAG-3, anti-PD-1, anti-PD-L1, or
             anti-PD-L2 antibody (any line of therapy).

          -  Presence of symptomatic central nervous system (CNS) metastases, or CNS metastases
             that require local CNS-directed therapy (such as radiotherapy or surgery), or
             increasing doses of corticosteroids within 2 weeks prior to initiating study
             treatment.

          -  History of severe hypersensitivity reactions to any ingredient of study drug(s) and
             other mAbs and/or their excipients.

          -  Impaired cardiac function or clinically significant cardiac disease.

          -  HIV infection.

          -  Patients with active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection,
             including those with inactive disease for patients receiving either capmatinib, MCS110
             or canakinumab.

          -  Active, known or suspected autoimmune disease.

          -  History of or current interstitial lung disease or pneumonitis grade ≥ 2.

          -  Subjects with tuberculosis (TB), for patients receiving either MCS110 or canakinumab.

        Other eligibility criteria apply.