Note: The DearEsq free 'ask a lawyer' site is offered as a free informational service to the public and is not intended as legal advice. Laws vary from state-to-state, and in addition every situation is unique, and relevant facts may not be known. The answer to the question posed below may not apply to in your state or to your situation. For legal advice in your state and your situation you should consult with an attorney in your state who is familiar with the rules and laws in your state.
“If a tenant signs a lease [in Baltimore city} that clearly states it is the tenants responsibiltiy to clear the sidewalk/steps of ice and snow and the tenant does not do this, would the landlord or tenant be held liable if a 3rd party is injured from slipping/falling on that sidewalk?”
Most likely both. The injured party will sue everyone who they can recover from, and let them work it out.
