  A global measure of quantum correlations for tripartite nonorthogonal states
is presented. It is introduced as the overall average of the pairwise
correlations existing in all possible partitions. The explicit expressions for
the global measure are derived for squared concurrence, entanglement of
formation, quantum discord and its geometric variant. As illustration, we
consider even and odd three-mode Schr\"odinger cat states based on Glauber
coherent states. We also discuss limitations to sharing quantum correlations
known as monogamy relations.
