Suppose I learn an optimal policy $\pi(a|c)$ for a contextual multi-armed bandit problem, where the context $c$ is a composite of multiple context variables $c = c_1, c_2, c_3$. For example, the context is specified by three Bernoulli variables.
Is there any literature on how to determine the optimal policy in the event where I no longer have access to one of the context variables?