My gas steam boiler was operating at approximately 3-5 minutes of run time
Followed by 10-15 minutes of not running. When the last run cycle ended the
Boiler did not run again for 3 hours.

The thermostat was set at 70 degrees and the temperature reading on the
Thermostat was 70 degrees and the house was starting to feel cool.

Does this sound like a normal condition?

What happens if you raise the thermostat?

I did raise the thermostat during this time.

And what happened? Did the boiler kick in? What you are describing is not uncommon. The house reaches set temperature, ambient temperature is maintained and no heat is required. Feeling cold is subjective.

Yes, the boiler kicked in after 3 hours. Appears to be running normal cycles now.Temp remained at 70 degrees.Thanks for your answer.Phil52