We know by Ocarina of Time, according to a Sheikah stone, the Sheikah tribe has been nearly wiped out, most likely due to the civil war.
"They say that Princess Zelda's nanny is actually one of
the Sheikah, who many thought had died out."
And in Breath of the Wild the old man said,
"
Long ago, an advanced civilization known as
the Sheikah inhabited these lands.
It was the power and wisdom of the Sheikah that saved this land time and time again.
But their civilization disappeared long ago...or so it is said."
so they're gone here as well.
so it's probably after ocarina of time.
Now then there's the master sword and its location
SS- Found in the Goddess statue in Skyloft (Goddess Sword form) Then Left in the sealed temple
OoT- Found and left in the Temple of time
ALttP- Found and left in the Lost Woods
OoS- In a linked game upgraded by Farore
OoA- In a linked game upgraded by Farore
ALBW- Found, and left in the Lost Woods
TP- Found and left in the Temple of time ruins
TWW- Found in Hyrule Castle, and left in Ganondorf's head
BotW- It seems to be located in a forest area
I think it's safe to say it's before The Wind Waker, but then there's this guy
and like 4 others I think can be found in BotW
Then in TPHD we have what looks like Ritos here
I'm just getting myself more confused.