[Threshold]

Can't you just:

pawn Код:

if(StrangerID[playerid])
    {
        new Float:arm, Float:hps, healthstring[64], string[128];
        GetPlayerHealth(playerid, hps);
        GetPlayerArmour(playerid, arm);
        new var = floatround(hps), var2 = floatround(arm);
        format(healthstring, sizeof(healthstring), (var2) ? ("\nHP: %d | Armour: %d") : ("\nHealth: %d"), (var2) ? (var, var2) : (var));
        PlayerInfo[playerid][HealthString] = healthstring;
        format(string, sizeof(string), "%s%s", PlayerInfo[playerid][StrangerMask], healthstring);
        Update3DTextLabelText(StrangerTag[playerid], WHITE, string);
    }

I don't know how big your 'StrangerMask' is, so I just used 128. (I'm assuming it's not 256 cells long...)

EDIT: This way, your 'PlayerInfo[playerid][StrangerMask]' never changes, and you won't need to delete anything from it.