Theory of everything must include consciousness. In this article, we focus on introducing the subjective experience (SE) aspect of consciousness in modern quantum physics, namely, loop quantum gravity (LQG) and string theory by using the methodology of examining invariance of these theories under the PE-SE transformations, where PEs (proto-experiences) are precursors of SEs. In our dualaspect-dual-mode PE-SE framework, (i) each of strings, loops, elementary particles, inert matter, or neural-networks has physical (material) and mental aspects, and (ii) there are three competing hypotheses: superposition based H 1 , superposition-thenintegration H 2 , and integration based H 3 as discussed in Part I. In Part I and Part II of this series of 3 articles, we introduced the SE aspect of consciousness in classical and orthodox quantum physics, respectively, which are invariant under PE-SE transformations. In the current Part III, the critical components of LQG with Palatini action appear invariant under this transformation. In string theory, for H 1 and H 2 , we quantitatively introduce the superposition of potential experiences (SEs/PEs) in the mental aspect of bosonic and fermionic strings using the Polyakov action. We find that experiences are independent of the time-like and space-like parameters (τ, σ).